Question

Find the value of x , if the following are in proportion : 4,10,42 and x
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Answer 1

Answer:

$4:10::42:x$

$4 \times x = 10 \times 42$

$4x = 420$

$x = \frac{420}{4}$

$x = 105$

Answer 2

Given,

• 4,10,42, and x are in proportion.

To find,

• Value of x

Solution,

The value of x if 4,10,42 and x are in proportion is 105.

We can simply find the value of x by using the condition of proportionality,

               $4:10 ::42:x$

             $4/10 = 42/x$

                   $x = 42 *10/4$

                   $x = 105$

∴ The value of x = 105.

Hence, the value of x, if 4,10,42, and x are in proportion, is 105.