Question

Check whether the following quantities form a proportion or not:​ (iv) $0.4,0.5,2.9$ and $3.5$.​

Answer 1

Find the ratio of first two and last two quantities :
Ratio of first two terms $=\frac{0.4}{0.5}=\frac{4}{5}$

Ratio of last two terms $=\frac{2.9}{3.5}=\frac{29}{35}$
Since the Ratio of $0.4$ and $0.5$ $\ne$ Ratio of $2.9$ and $3.5$.
Hence, the given quantities do not form a proportion .