MCQ
The third proportional to $6 \frac{1}{4}$ and 5 is
- A4
- B$8 \frac{1}{2}$
- C3
- Dnone the these
✓
Answer
The third proportional to $6 \frac{1}{4}$ and 5 is
$
\begin{aligned}
& \Rightarrow 6 \frac{1}{4}: 5:: 5: x \\
& \Rightarrow \frac{25}{4}: 5:: 5: x \\
& \Rightarrow x=\frac{5 \times 5}{25} \times 4 \\
& \Rightarrow 4
\end{aligned}
$
$
\begin{aligned}
& \Rightarrow 6 \frac{1}{4}: 5:: 5: x \\
& \Rightarrow \frac{25}{4}: 5:: 5: x \\
& \Rightarrow x=\frac{5 \times 5}{25} \times 4 \\
& \Rightarrow 4
\end{aligned}
$
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