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Finding the Fourth Proportional to 422.03, 632.54 and 239.18

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Solution

The fourth proportional to 422.03, 632.54 and 239.18 is: 358.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.03 : 632.54 = 239.18 : x
  2. Step 2: Convert to fraction form
    422.03/632.54 = 239.18/x
  3. Step 3: Cross multiply
    422.03x = 632.54 × 239.18
  4. Step 4: Simplify right side
    422.03x = 151,288.35
  5. Step 5: Solve for x
    x = 151,288.35/422.03
  6. Step 6: Final answer
    x = 358.48

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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.