Finding the Fourth Proportional to 57.16, 85.56 and 39.99
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Solution
The fourth proportional to 57.16, 85.56 and 39.99 is: 59.86
Step by Step Solution
- Step 1: Write the proportion equation
57.16 : 85.56 = 39.99 : x - Step 2: Convert to fraction form
57.16/85.56 = 39.99/x - Step 3: Cross multiply
57.16x = 85.56 × 39.99 - Step 4: Simplify right side
57.16x = 3,422.05 - Step 5: Solve for x
x = 3,422.05/57.16 - Step 6: Final answer
x = 59.86
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.