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Finding the Fourth Proportional to 422.32, 633 and 239.80

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Solution

The fourth proportional to 422.32, 633 and 239.80 is: 359.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.32 : 633 = 239.80 : x
  2. Step 2: Convert to fraction form
    422.32/633 = 239.80/x
  3. Step 3: Cross multiply
    422.32x = 633 × 239.80
  4. Step 4: Simplify right side
    422.32x = 151,793.40
  5. Step 5: Solve for x
    x = 151,793.40/422.32
  6. Step 6: Final answer
    x = 359.43

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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.