Question

If the mean proportional between x and 2 is 4, find x.

Answer 1

mean proportion

=a+b/2

x+2\2=4

x+2=8

x=8-2

x=6

your answer=6

Answer 2

Given that the mean proportional between x and 2 is 4.

Mean proportional: The positive integer x is the Mean Proportion or Geometric Mean of the two positive numbers p and q, such that $\frac{p}{x}=\frac{x}{q}$ .

Now from the given data

$4=\sqrt{x \times 2}\\\Rightarrow 4=\sqrt{2x}\\\Rightarrow 16=2x\\\Rightarrow x=8$

Therefore the value of x is 8.

To learn more about mean proportional from the given link

https://brainly.in/question/2770149

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