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Finding the Fourth Proportional to 754.96, 1,132.56 and 429.66

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Solution

The fourth proportional to 754.96, 1,132.56 and 429.66 is: 644.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.96 : 1,132.56 = 429.66 : x
  2. Step 2: Convert to fraction form
    754.96/1,132.56 = 429.66/x
  3. Step 3: Cross multiply
    754.96x = 1,132.56 × 429.66
  4. Step 4: Simplify right side
    754.96x = 486,615.73
  5. Step 5: Solve for x
    x = 486,615.73/754.96
  6. Step 6: Final answer
    x = 644.56

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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.