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Finding the Fourth Proportional to 423.32, 634.85 and 134.69

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Solution

The fourth proportional to 423.32, 634.85 and 134.69 is: 201.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.32 : 634.85 = 134.69 : x
  2. Step 2: Convert to fraction form
    423.32/634.85 = 134.69/x
  3. Step 3: Cross multiply
    423.32x = 634.85 × 134.69
  4. Step 4: Simplify right side
    423.32x = 85,507.27
  5. Step 5: Solve for x
    x = 85,507.27/423.32
  6. Step 6: Final answer
    x = 201.99

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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.