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Finding the Fourth Proportional to 658.20, 985.86 and 530.04

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Solution

The fourth proportional to 658.20, 985.86 and 530.04 is: 793.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.20 : 985.86 = 530.04 : x
  2. Step 2: Convert to fraction form
    658.20/985.86 = 530.04/x
  3. Step 3: Cross multiply
    658.20x = 985.86 × 530.04
  4. Step 4: Simplify right side
    658.20x = 522,545.23
  5. Step 5: Solve for x
    x = 522,545.23/658.20
  6. Step 6: Final answer
    x = 793.90

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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.