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Finding the Fourth Proportional to 422.00, 632.63 and 239.13

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Solution

The fourth proportional to 422.00, 632.63 and 239.13 is: 358.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.00 : 632.63 = 239.13 : x
  2. Step 2: Convert to fraction form
    422.00/632.63 = 239.13/x
  3. Step 3: Cross multiply
    422.00x = 632.63 × 239.13
  4. Step 4: Simplify right side
    422.00x = 151,279.62
  5. Step 5: Solve for x
    x = 151,279.62/422.00
  6. Step 6: Final answer
    x = 358.49

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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.