cross product.
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Irrational numbers can't be expressed as fractions .
You do not solve ratios: they are simply a form of numbers. There may be questions whose solutions require you to work with ratios but there the answer will depend on the sort of question you have to deal with.
Ratios are basically decimals, numbers, perfect squares which all come down to being fractions.As we cut fractions, same method is applied to ratios.... Cathy
A true proportion is when two ratios are equal to one another. To prove this, you need to find the cross products of the ratios and see if they are equal. An example of a true proportion are the ratios 1/2 and 5/10, if you take the cross product the result is 2 x 5 = 1 x 10, which are equal.
There aren't really two specific numbers, but you have tO come up with them like say 4 and 8.