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Finding the Fourth Proportional to 747.67, 1,119.68 and 616.87

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Solution

The fourth proportional to 747.67, 1,119.68 and 616.87 is: 923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.67 : 1,119.68 = 616.87 : x
  2. Step 2: Convert to fraction form
    747.67/1,119.68 = 616.87/x
  3. Step 3: Cross multiply
    747.67x = 1,119.68 × 616.87
  4. Step 4: Simplify right side
    747.67x = 690,693.92
  5. Step 5: Solve for x
    x = 690,693.92/747.67
  6. Step 6: Final answer
    x = 923.80

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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.