Final answer:
The entire population of the school is 1015.
Step-by-step explanation:
To determine the entire population of the school, we need to find out the number of girls first. The ratio of boys to girls is given as 3 to 4. Therefore, the ratio of boys to the entire population is 3 to 7 (boys + girls). We know that there are 435 boys, so we can set up a proportion:
3/7 = 435/x
Cross-multiplying, we get:
3x = 7 * 435
Simplifying, we find that the entire population of the school is 1015.