Question

the mean proportional between 0.9 and 0.4

Answer 1

According to qn,

0.9/x = x/0.4

=> x^2 = 0.9 × 0.4 = 0.36
=> x = √0.36 = 0.6

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Answer 2

Answer: The mean proportional between 0.9 and 0.4 is 0.6.

Step-by-step explanation:

Since we have given that

Let the mean proportional be 'x'

So, its proportion can be written as

$0.9:x::x::0.4$

So, it becomes,

$\frac{0.9}{x}=\frac{x}{0.4}\\\\x^2=0.9\times 0.4\\\\x^2=0.36\\\\x=\sqrt{0.36}\\\\x=0.6$

Hence, the mean proportional between 0.9 and 0.4 is 0.6.