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Finding the Fourth Proportional to 801.38, 1,105.85 and 447.29

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Solution

The fourth proportional to 801.38, 1,105.85 and 447.29 is: 617.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.38 : 1,105.85 = 447.29 : x
  2. Step 2: Convert to fraction form
    801.38/1,105.85 = 447.29/x
  3. Step 3: Cross multiply
    801.38x = 1,105.85 × 447.29
  4. Step 4: Simplify right side
    801.38x = 494,627.88
  5. Step 5: Solve for x
    x = 494,627.88/801.38
  6. Step 6: Final answer
    x = 617.22

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Double scale
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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.