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Finding the Fourth Proportional to 747.66, 1,112.18 and 739.77

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Solution

The fourth proportional to 747.66, 1,112.18 and 739.77 is: 1,100.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.66 : 1,112.18 = 739.77 : x
  2. Step 2: Convert to fraction form
    747.66/1,112.18 = 739.77/x
  3. Step 3: Cross multiply
    747.66x = 1,112.18 × 739.77
  4. Step 4: Simplify right side
    747.66x = 822,753.70
  5. Step 5: Solve for x
    x = 822,753.70/747.66
  6. Step 6: Final answer
    x = 1,100.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.