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Solution:

For California:

Male population below poverty line = 2.4 million.

Let the female population below the poverty line be x million.

Then, 3 : 5 = 2.4 : x => x = \frac{5}{3}\times 2.4 = 4

Therefore Total population below poverty line = (2.4 + 4) = 6.4 million.

If Nq be the total population of California, then,

25% of Nq = 6.4 million => Nq = \left ( \frac{6.4\times 100}{25} \right ) \text { million } = 25.6 million.

For Ohio:

Male population below poverty line = 6 million.

Let the female population below poverty line be y million.

Then, 5 : 3 = 6 : y => y =\frac{3}{5}\times 6 = 3.6 million

Therefore Total population below the poverty line = (6 + 3.6) = 9.6 million.

If Nt be the total population of Ohio, then,

15% of Nt = 9.6 million => Nt = \left ( \frac{9.6\times 100}{15} \right )\text{ million } = 64 million.<br />
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Thus, Required ratio =\frac{Nq}{Nt} = \frac{25.6}{64} = 0.4 = \frac{2}{5}