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Finding the Fourth Proportional to 801.11, 1,105.52 and 451.80

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Solution

The fourth proportional to 801.11, 1,105.52 and 451.80 is: 623.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.11 : 1,105.52 = 451.80 : x
  2. Step 2: Convert to fraction form
    801.11/1,105.52 = 451.80/x
  3. Step 3: Cross multiply
    801.11x = 1,105.52 × 451.80
  4. Step 4: Simplify right side
    801.11x = 499,471.68
  5. Step 5: Solve for x
    x = 499,471.68/801.11
  6. Step 6: Final answer
    x = 623.48

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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.