Question

find the mean proportional between 4 and 121​

Answer 1

Given,

Two main numbers are = 4 and 121

To find,

The mean proportional between the two given numbers.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

Let, the mean proportional = x

According to the definition of mean proportional,

4:x :: x:121

4/x = x/121

x² = 121×4

x² = 484

x = √484

x = ± 22

(This value will be considered as the mean proportional of the given two main numbers, ie. 4 and 121.)

Hence, the mean proportional is ± 22