We used ratios to estimate sizes of other things. We did it like this…
1. We measured the ritz box, and it was 19cm.
2. Then we compared it to one of the lockers outside.
3. There were about 4.5 ritz boxes.
4. We made it into a ratio.
Ritz box ->1:4.5<- Locker
5. Then we did the math.
4.5 x 19=85.5
6. After that, we measured the locker. It was 90.2cm.
The ratio we estimated was 1:4.5, and the real ratio was 1:4.75(Rounded)
We did a pretty good estimate using ratios! (Although it was 4.7cm off :P)