Nail the math class down to go further
What proportions are really are is they are 2 ratios that equal the same thing.
Proportions are useful for mph, mpg, and any other thing that has the word "per".
It seems surprising but all proportion equations use that word like a proportion
problem on how many miles a car drives in 1 hour. To set up a proportion, the
numerator of the first fraction is the total number and the denominator is per.
An example can be a car driving 300 miles in 6 hours in which the numerator
is 300 and the denominator is 6. It should equal x as the numerator since
that is what we need to find out the answer to. The denominator would be the per
like in the problem used as an example. Let's say we need to find out how many miles
is the car driving in 1 hour, we would put x in the second numerator and the 1
which is the per like in per 1 hour. Cross multiply the numerator denominator
and denominator numerator. Divide the left hand side by the number that will
leave x and you will be left with x equals and the equation on the right
hand side. In this example problem when you solve the equation on the right
you should have the answer of the car driving 50 miles in 1 hour or 50 mph.
Inline formula: \( \frac{a}{b}= \frac{c}{d} \)
1. \( \frac{300}{6}= \frac{x}{1} \)