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Finding the Fourth Proportional to 801.82, 1,105.81 and 539.38

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Solution

The fourth proportional to 801.82, 1,105.81 and 539.38 is: 743.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.82 : 1,105.81 = 539.38 : x
  2. Step 2: Convert to fraction form
    801.82/1,105.81 = 539.38/x
  3. Step 3: Cross multiply
    801.82x = 1,105.81 × 539.38
  4. Step 4: Simplify right side
    801.82x = 596,451.80
  5. Step 5: Solve for x
    x = 596,451.80/801.82
  6. Step 6: Final answer
    x = 743.87

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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.