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Finding the Fourth Proportional to 488.27, 731.25 and 423.80

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Solution

The fourth proportional to 488.27, 731.25 and 423.80 is: 634.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.27 : 731.25 = 423.80 : x
  2. Step 2: Convert to fraction form
    488.27/731.25 = 423.80/x
  3. Step 3: Cross multiply
    488.27x = 731.25 × 423.80
  4. Step 4: Simplify right side
    488.27x = 309,904.43
  5. Step 5: Solve for x
    x = 309,904.43/488.27
  6. Step 6: Final answer
    x = 634.70

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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.