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Finding the Fourth Proportional to 425.32, 636.24 and 321.83

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Solution

The fourth proportional to 425.32, 636.24 and 321.83 is: 481.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.32 : 636.24 = 321.83 : x
  2. Step 2: Convert to fraction form
    425.32/636.24 = 321.83/x
  3. Step 3: Cross multiply
    425.32x = 636.24 × 321.83
  4. Step 4: Simplify right side
    425.32x = 204,761.12
  5. Step 5: Solve for x
    x = 204,761.12/425.32
  6. Step 6: Final answer
    x = 481.43

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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.