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Finding the Fourth Proportional to 815.47, 1,124.82 and 531.97

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Solution

The fourth proportional to 815.47, 1,124.82 and 531.97 is: 733.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.47 : 1,124.82 = 531.97 : x
  2. Step 2: Convert to fraction form
    815.47/1,124.82 = 531.97/x
  3. Step 3: Cross multiply
    815.47x = 1,124.82 × 531.97
  4. Step 4: Simplify right side
    815.47x = 598,367.68
  5. Step 5: Solve for x
    x = 598,367.68/815.47
  6. Step 6: Final answer
    x = 733.77

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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.