Question

insert three rational number between 1/4 and 1/7

Answer 1

So there are five rational numbers that lie between 1/4 and 1/2. Not in numerical order:

3/8

5/16

7/16

9/32

15/32

Answer 2

Three Rational Number Between are as follows::
$\frac{1}{4} \times \frac{7}{7} = \frac{7}{28}$
$\frac{1}{7} \times \frac{4}{4} = \frac{4}{28}$

Numbers between 4/28 and 7/28 are as follows ...5/28, 6/28 and

One more can be 4/28×4/4= 16/ 112


There can be many rational number between any two..

Hope it Helps