Question

Find the fourth proportional to $4,6,8$

Answer 1

Step $1:$ To find the fourth proportional to $4,6,8$

Let the fourth proportional be $x$

Then $4,6,8$ and $x$ are in proportion$.$

Product of means $=$ Product of extremes

Step $2:$ Now find the value of x using property of proportion

$4\times x=6\times 8$

$x=\frac{6\times 8}{4}$

$x=6\times 2$

$x=12$

Hence, the fourth proportion of $4,6,8$ is $12$