Question

The mean proportional between 234 and 104 is
A. 39
B. 54
C. 27
D. None of these

Answer 1

Hint-To find the mean proportion between two numbers x and y we need to calculate the square root of the product of these two numbers. The mean proportion between x and y is given by $\sqrt {x.y} $ .

Complete step-by-step answer:
Given:
Let x= 234
And y=104
Therefore the mean proportion is given by $\sqrt {x.y} $
$ = \sqrt {234 \times 104} = \sqrt {24336} = 156$
The mean proportion between 234 and 104 is 156 .

Note-
In this particular type of question it is important to note that the term "mean proportional" may also be referred to as "geometric mean" . Mean proportional, or geometric mean, is not the same as the Arithmetic Mean. While an arithmetic mean deals with addition, a geometric mean deals with multiplication.