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Finding the Fourth Proportional to 488.13, 732.20 and 392.55

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Solution

The fourth proportional to 488.13, 732.20 and 392.55 is: 588.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.13 : 732.20 = 392.55 : x
  2. Step 2: Convert to fraction form
    488.13/732.20 = 392.55/x
  3. Step 3: Cross multiply
    488.13x = 732.20 × 392.55
  4. Step 4: Simplify right side
    488.13x = 287,423.15
  5. Step 5: Solve for x
    x = 287,423.15/488.13
  6. Step 6: Final answer
    x = 588.83

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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.