Use a proportion
Fast food. If four out of five doctors prefer fast food,
then at a convention of 445 doctors, how many prefer fast
food?
4/5=x/445 i belive you can solve this
5x=1780 (4x445)
1780/5
x=356
checking to see if I completed right.
Yes
To solve this problem using a proportion, we need to set up a ratio of doctors who prefer fast food to the total number of doctors.
First, let's express the given information in ratio form. We know that four out of five doctors prefer fast food. This can be written as 4/5.
Next, we can set up a proportion by setting this ratio equal to another ratio. In this case, we'll set it equal to the ratio of doctors who prefer fast food to the total number of doctors at the convention.
Let's say x represents the number of doctors who prefer fast food at the convention. The proportion can be set up as:
4/5 = x/445
To solve for x, we can cross-multiply:
5x = 4 * 445
Now, multiply 4 by 445:
5x = 1780
Finally, divide both sides of the equation by 5 to solve for x:
x = 1780 / 5
x = 356
Therefore, at the convention of 445 doctors, approximately 356 doctors prefer fast food.