There are several math problems about ratio and proportion, and the answers are as follows: 1, the formula is not an equation! 2. Briefly explain why you want to do this (subhead)

1, consider it five copies and four copies.

360/(5+4)=40, 40x5=200 (the distance traveled in the first half), 360-200= 160 (the second half).

180/5=36 (time spent in the first half)

(200-180)/5+160/4 = 44 (second half)

Time ratio -36: 44 = 9: 1 1.

2. The rabbit runs 3 steps, and the distance the dog runs is equivalent to 3.5 steps (7/(4/2)=3.5).

So the distance between the dog and the rabbit was shortened by half a step (3.5-3).

The three steps (rabbit size) of a dog's running are used to offset the distance the rabbit runs, and the 0.5 step is to catch up.

In this 0.5 step, the distance of 19 meters was chased.

0.5: 3 = 1: 6, so the offset distance is 6 times the catch-up distance.

Total * * * cancels the distance of 6x 19 = 1 14m.

So the dog kept running114+19 =133 meters.