Final answer:
The equivalent ratio of 30 can be found by multiplying both the numerator and denominator of the ratio by the same constant.
Step-by-step explanation:
A ratio is a comparison of two quantities. To find the equivalent ratio of 30, we can set up a proportion by selecting a constant multiplier and multiplying both the numerator and denominator of the ratio by that same constant. For example, if we multiply both 30 and 1 by 2, we get the equivalent ratio of 60:2. Similarly, if we multiply both 30 and 1 by 3, we get the equivalent ratio of 90:3. In general, any multiple of the original numbers will give us an equivalent ratio.