Find the third proportional to 5.25, 7 - Vidyadip

Question

Find the third proportional to $5.25, 7$

✓

Answer

Let the required third proportional be $x$
$\therefore 5.25,7, x$ are in continued proportion
$\Rightarrow 5.25: 7=7: x $
$\Rightarrow 5 x=7 \times 7 $
$\Rightarrow x=\frac{7 \times 7}{5.25} $
$\Rightarrow x=\frac{49}{5.25}=\frac{28}{3} $
$\Rightarrow x=9 \frac{1}{3}$
$\therefore$ Required proportional $=9 \frac{1}{3}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 marks sum]" from Proportion (Including Word Problems)→Proportion (Including Word Problems) — all question types→MATHS STD 6 question papers→ICSE Board STD 6 question papers→ICSE Board question paper generator→

Similar questions

Express the following as a product of prime factor : 1197

Find the sum : $5 x^3-8 x^2+6 x-3, x^2-2 x+15$ and $16-2 x^3$.

Simplify:
$1 \frac{11}{12}-\frac{13}{16}$

Solve $: 3y - 2 = 1$

A tin contains 20 litres of petrol. Due to leakage, 3 litres of petrol is lost. What percent is still present in the tin?

Insert the symbol ' $=$ ' or ' $>$ ' or '<' between the pair of fractions, given below:
$\frac{6}{11} \ldots \frac{5}{9}$

A bag contained 98 kg 300 g of wheat. There was a consumption of 36 kg 450 g, 28 kg 360 g and 32 kg 880 g during three months. How much wheat remains in the bag?

Write with commas and also write the number name of the numeral 695803704 in Hindu Arabic system.

Simplify : $2 \frac{2}{7}$ of $15 \frac{3}{4} \times 2 \frac{1}{4} \div \frac{4}{7}$ of $2 \frac{5}{8}$

A boy drives his scooter with a uniform speed of 45 km/h. Find the time taken by him to cover 108 km.