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Finding the Fourth Proportional to 754.57, 1,041.42 and 439.89

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Solution

The fourth proportional to 754.57, 1,041.42 and 439.89 is: 607.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.57 : 1,041.42 = 439.89 : x
  2. Step 2: Convert to fraction form
    754.57/1,041.42 = 439.89/x
  3. Step 3: Cross multiply
    754.57x = 1,041.42 × 439.89
  4. Step 4: Simplify right side
    754.57x = 458,105.04
  5. Step 5: Solve for x
    x = 458,105.04/754.57
  6. Step 6: Final answer
    x = 607.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.