Finding the Fourth Proportional to 57.28, 85.74 and 42.08
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Solution
The fourth proportional to 57.28, 85.74 and 42.08 is: 62.99
Step by Step Solution
- Step 1: Write the proportion equation
57.28 : 85.74 = 42.08 : x - Step 2: Convert to fraction form
57.28/85.74 = 42.08/x - Step 3: Cross multiply
57.28x = 85.74 × 42.08 - Step 4: Simplify right side
57.28x = 3,607.94 - Step 5: Solve for x
x = 3,607.94/57.28 - Step 6: Final answer
x = 62.99
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.