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Finding the Fourth Proportional to 424.31, 636.12 and 332.78

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Solution

The fourth proportional to 424.31, 636.12 and 332.78 is: 498.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.31 : 636.12 = 332.78 : x
  2. Step 2: Convert to fraction form
    424.31/636.12 = 332.78/x
  3. Step 3: Cross multiply
    424.31x = 636.12 × 332.78
  4. Step 4: Simplify right side
    424.31x = 211,684.83
  5. Step 5: Solve for x
    x = 211,684.83/424.31
  6. Step 6: Final answer
    x = 498.90

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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.