Question

mean proportion of 4 and 9

Answer 1

4:x:x:9
solve this you get
${x}^{2 } = 36 \\ x = \sqrt{36}$
so x=6

hope you get it

Answer 2

Hey mate !!

Here's the answer !!

We know that,

Mean Proportion = √ ab 

Here ' a ' and ' b ' are numbers given. So substituting them in the formula we get,

Mean Proportion = √ 9 × 4 = √ 36 = 6

Here for Mean proportion only Positive value of root is taken.

Hence 6 is the mean proportion of 4 and 9.

Hope my answer helped !!

Cheers !!