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Finding the Fourth Proportional to 754.72, 1,132.18 and 429.39

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Solution

The fourth proportional to 754.72, 1,132.18 and 429.39 is: 644.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.72 : 1,132.18 = 429.39 : x
  2. Step 2: Convert to fraction form
    754.72/1,132.18 = 429.39/x
  3. Step 3: Cross multiply
    754.72x = 1,132.18 × 429.39
  4. Step 4: Simplify right side
    754.72x = 486,145.70
  5. Step 5: Solve for x
    x = 486,145.70/754.72
  6. Step 6: Final answer
    x = 644.14

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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.