And since we don't know the context they could have shown a closer up burger, or heck, taller burger that is 1/4 and a 1/3 next to each other but further away or stepped on at which point they were asked, what's bigger?

Also, the 1/4 or 1/3 is referring to the raw, uncooked meat only. So in theory you can add 1400 lbs of lettuce to make something larger than my car. (Which is terrible, since lettuce is where you pick up all the disease these days - everyone here should order all their food without any lettuce)