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Finding the Fourth Proportional to 801.66, 1,105.78 and 469.97

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Solution

The fourth proportional to 801.66, 1,105.78 and 469.97 is: 648.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.66 : 1,105.78 = 469.97 : x
  2. Step 2: Convert to fraction form
    801.66/1,105.78 = 469.97/x
  3. Step 3: Cross multiply
    801.66x = 1,105.78 × 469.97
  4. Step 4: Simplify right side
    801.66x = 519,680.43
  5. Step 5: Solve for x
    x = 519,680.43/801.66
  6. Step 6: Final answer
    x = 648.25

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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.