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Finding the Fourth Proportional to 877.52, 1,318.28 and 531.76

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Solution

The fourth proportional to 877.52, 1,318.28 and 531.76 is: 798.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.52 : 1,318.28 = 531.76 : x
  2. Step 2: Convert to fraction form
    877.52/1,318.28 = 531.76/x
  3. Step 3: Cross multiply
    877.52x = 1,318.28 × 531.76
  4. Step 4: Simplify right side
    877.52x = 701,008.57
  5. Step 5: Solve for x
    x = 701,008.57/877.52
  6. Step 6: Final answer
    x = 798.85

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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.