Which pair of measurements is equivalent? 8,600 mg, 86 g 2,500 g, 250 kg 3.4 kg, 3,400 g 480 g, 4.8 mg

Let's look at each pair and change it so the first one in the pair will be what the second one will be converted to.
8,600 mg = 86,000 mg; So now, the first one is not equivalent.
2,500 g = 250,000 g; Not that one either.
3.4 kg = 3.4 kg; This one is correct. We can check by checking the last pair.
480 g = .0048 g; Nope.
So 3.4 kg, 3400 g would be the correct answer.

Yes. there is a constant ratio of number of calories to gram of protein.12/3=24/4=32/8=44/11=4