Question

FIND THE MEAN PROPOTION BETWEEN 3 AND 12​

Answer 1

Explanation:

Here 3 x 12=36.

And √36 is 6, the mean proportional sought.

For 3∶6∷6∶12

Ex. 2. To find a Mean between 2 and 5.

Here 2 x 5=10 (3.162278 the mean reqd.

Answer 2

Answer:

6

Explanation:

let the mean proportion be X

therefore : 3:x::x12

According to the questions,

3:x::x:12

=3/X=X/12

=X*X=3*12

=X*X=36

=X=√36

=X=6AN