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Finding the Fourth Proportional to 422.97, 634.56 and 134.41

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Solution

The fourth proportional to 422.97, 634.56 and 134.41 is: 201.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.97 : 634.56 = 134.41 : x
  2. Step 2: Convert to fraction form
    422.97/634.56 = 134.41/x
  3. Step 3: Cross multiply
    422.97x = 634.56 × 134.41
  4. Step 4: Simplify right side
    422.97x = 85,288.95
  5. Step 5: Solve for x
    x = 85,288.95/422.97
  6. Step 6: Final answer
    x = 201.64

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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.