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Finding the Fourth Proportional to 422.08, 632.80 and 229.76

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Solution

The fourth proportional to 422.08, 632.80 and 229.76 is: 344.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.08 : 632.80 = 229.76 : x
  2. Step 2: Convert to fraction form
    422.08/632.80 = 229.76/x
  3. Step 3: Cross multiply
    422.08x = 632.80 × 229.76
  4. Step 4: Simplify right side
    422.08x = 145,392.13
  5. Step 5: Solve for x
    x = 145,392.13/422.08
  6. Step 6: Final answer
    x = 344.47

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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.