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Finding the Fourth Proportional to 747.27, 1,121.96 and 542.85

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Solution

The fourth proportional to 747.27, 1,121.96 and 542.85 is: 815.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.27 : 1,121.96 = 542.85 : x
  2. Step 2: Convert to fraction form
    747.27/1,121.96 = 542.85/x
  3. Step 3: Cross multiply
    747.27x = 1,121.96 × 542.85
  4. Step 4: Simplify right side
    747.27x = 609,055.99
  5. Step 5: Solve for x
    x = 609,055.99/747.27
  6. Step 6: Final answer
    x = 815.04

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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.