Question

Find the value of $x$, if the following is in proportion: $x,4,6and8$.

Answer 1

Find the value of $x$:

Since $x,4,6and8$ are in proportion,

$x:4::6:8$

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

$\Rightarrow 8\times x=6\times 4$

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

$\Rightarrow x=3$

Hence, the value of $x$ is $3$.