Question

If 2,5,x are in proportion, find the value of 'x'. [Hint- 2:5::5:x]

Answer 1

given ratio = 2:5::5:X
solution :
Product of extremes = product of means
=> 2×x = 5 × 5
=> 2x = 25
=> X = 25/2
=> X = 12.5


X = 12.5


hope it will help

Answer 2

The value of x is 12.5.

Step-by-step explanation:

Given : If 2,5,x are in proportion.

To find : The value of 'x' ?

Solution :

If 2,5,x are in proportion i.e. $2:5:5:x$

We know,

Product of extremes = Product of means

i.e. $b^2=ac$

Here, a=2, b=5 and c=x

Substitute,

$5^2=2x$

$25=2x$

$x=\frac{25}{2}$

$x=12.5$

Therefore, the value of x is 12.5.

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