4th answer because the ratios are not the same. The ratios need to be the same. 1:2 and 2:4 ratio is the same because the fraction 1/2 is the same as 2/4. So, 3:4 ratio is the same as 9:12 because 3/4 is the same as 9/12. However 7:4 ratio or 7/4 is not the same as 4/3. So they are not similar.
