Question

The first, third and the fourth term of a proportion are 5, 7 and 42. Find the second term of the proportional.

Answer 1

PROPORTION

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Solve:

$\: \sf \Large \overbrace{\blue{5} \: : \: \underbrace{\green{x} \: : : \: \green{7}}_{ \tiny multiply} \: : \: \blue{42}}^{multiply}$

$\large \implies \sf \Large \blue{210} = \green{7x}$

$\large \implies \sf \Large \frac{210}{7} = \frac{ \cancel{7}x}{ \cancel{7}}$

$\large \implies \sf \Large \therefore \: x = 30$

$\:$

Final Answer:

$\: \sf \huge \orange{30}$

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