Question

The first, second, third terms of a proportion are 7, 14 , 25 respectively. What is its fourth term?​

Answer 1

Fourth proportion = 50

Explanation :

Given :

• First proportion = 7
• Second proportion = 14
• Third proportion = 25

To Find :

• Fourth proportion

Solution :

Let the required fourth proportion be 'y'

Then,

7, 14, 25, y are in proportion

So,

Product of extremes = Product of means

$\small\rm\bf{7 \times y = 14 \times 25}$

$⇢ \small\rm{y = \dfrac{14 \times 25}{7} }$

$⇢ \small\rm{y = 50}$

Hence, the fourth proportional to 7, 14, 25 is 50.