The ratio between the fourth proportional of 7, 5, and 3 to the third proportional of 7 and 13 is:

Find the fourth proportional of 3 hours 20 minutes, 1 hour 50 minutes, and 6 hours 20 minutes.

Find the third proportional of 5 and 11.

A certain number is subtracted from each of the numbers 20, 24 and 29. After subtraction, those numbers are proportional. What is the number subtracted?

The ratio of the third proportion of 5 and 12 with the fourth proportion of 5, 8 and 9 is:

What is the fourth proportional to 0.12, 0.16 and 0.21?

The mean proportional between \(4+2\sqrt 3\;and \;6-3\sqrt 3 \) is :

If x and y are inversely proportional to each other and x = 27 when y = 7, then what is the value of x when y = 21?

Find the third proportional of (b² - a²) and (b² - ab).

If 0.25 : x :: 3 : 8, then x = ?

The third proportional to a³ + b³ and a² + ab + b², when a = 2 and b = 3 is: (correct to 2 decimal places)

The ratio of the third proportional of P and Q and the fourth proportional of P, Q, and R is 5 : 6, then Q : R is:

When the same number is subtracted from each of 7, 9, 11, and 15, the resulting numbers are in proportion. The number subtracted is:

The fourth proportional to 16, 26, and 32 is:

What should be added to the each numbers 9, 22, 14, and 32 so that the obtained numbers are proportional? 

Find the mean propotional of squares of \(\frac {x} {y}\) and \(\frac {y}{z}\).

What is the smallest positive number that should be subtracted from each of 12 and 21 so that 36 is the third proportion to them?

If 27 : 81 :: x : 63, then find the value of x.

The fourth proportional to 3, 12, 14 is:

Determine the fourth proportional to 11.6 m, 9.2 m, 32.8 m. (Consider up to two decimals)

Which number should be subtracted from 17, 30, 22, and 40 so that the obtained numbers may become proportional?

If the third proportion to 8 and 18 is the same as the fourth proportion to 2, 81, and x² + 2x + 2, then find the value of x.

When the same number is subtracted from 6, 8, 12, and 20, the resulting numbers are in proportion. Find the number subtracted.

Find the fourth proportional to 7x - 1, 9x + 5 and 8x + 1, if x = 3.

Find the third proportional to 16 and 320.

A certain number is added to each of the numbers 11, 15, 19, and 25. After addition, these numbers are in proportional. What is the number added?

Find the fourth proportional to 7, 4, and 7.

If 3,x,12 and 2x + 7 are in proportion, then 6x is:

The fourth proportional of 6, 9, 18 is:

The third proportional to 0.1 and 0.12 is :

The mean proportional between 0.09 and 0.64 is:

If the third proportional to 8 and 24 is 'A' and the mean proportional of 4 and 16 is 'B', then the value of \(\frac{A}{B}\) is:

If (1/2) : x :: x : (1/8), find the positive value of x.

The value of P varies directly as the square of Q. When Q is 4, then P is 48. What is the value of Q when P is 243?

Find the 4^th proportional to 9, 17, and 27.

Find the fourth proportional of 22, 66, and 11.

Find the mean proportion of x³y and xy³.

The fourth proportion of 1.4, 8.4, and 4.2 is:

Find the fourth proportion for 15, 55 and 81.

The mean proportional between 0.03 and 0.0003 is:

Find the third proportional of 25 and 45.

If 42, 36, and 35 are the first three terms of a proportion, then the fourth term is:

Find the fourth proportional to 0.48, 0.84, and 32.

The fourth proportional to 0.3, 0.8 and 0.108 is:

Find the third proportional to 16 and 20.

Find the third proportional to 23 and 31.

Find the mean proportional between 32 and 162.

The third proportion between 25 and 35 is:

The third proportional to (x² - y²) and (x - y) is:

Find the fourth proportional of 144, 192, and 216.