See also: incorporation. INFUSION, med. jur. A pharmaceutical operation, which consists in pouring a hot or cold fluid upon a substance, whose medical properties it is desired to extract. Infusion is also used for the product of this operation.
A proportion is an equation with a ratio on each side. It is a statement that two ratios are equal. 3/4 = 6/8 is an example of a proportion. When one of the four numbers in a proportion is unknown, cross products may be used to find the unknown number.
Proportions are built from ratios. A ratio is just a comparison between two different things. For instance, someone can look at a group of people, count noses, and refer to the ratio of men to women in the group. Suppose there are thirty-five people, fifteen of whom are men.Then the ratio of men to women is 15 to 20.he ratio,  7 to 5  (or 7: 5 or 7/5), tells me that, of every 7 + 5 = 12 students, five failed. That is, 5/12 of the class flunked. Then (5/12)(36) = 15 students failed. 1  In the park mentioned above, the ratio of ducks to geese is 16 to 9.