Finding the Fourth Proportional to 58.62, 87.36 and 57.18
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Solution
The fourth proportional to 58.62, 87.36 and 57.18 is: 85.21
Step by Step Solution
- Step 1: Write the proportion equation
58.62 : 87.36 = 57.18 : x - Step 2: Convert to fraction form
58.62/87.36 = 57.18/x - Step 3: Cross multiply
58.62x = 87.36 × 57.18 - Step 4: Simplify right side
58.62x = 4,995.24 - Step 5: Solve for x
x = 4,995.24/58.62 - Step 6: Final answer
x = 85.21
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.