It is 1/4.
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The similarity ratio is 1:4.
It means 1:1.
1/4 = 0.25 in decimal
4 yards is 12 feet and so the ratio is 1 to 3
The ratio of areas is the square of the ratio of lengths. Ratio lengths = 1 : 2 → ratio areas = 1² : 2² = 1 : 4 → if the lengths are doubled, the areas of quadrupled (multiplied by 4).