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Finding the Fourth Proportional to 531.49, 733.33 and 391.71

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Solution

The fourth proportional to 531.49, 733.33 and 391.71 is: 540.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.49 : 733.33 = 391.71 : x
  2. Step 2: Convert to fraction form
    531.49/733.33 = 391.71/x
  3. Step 3: Cross multiply
    531.49x = 733.33 × 391.71
  4. Step 4: Simplify right side
    531.49x = 287,251.72
  5. Step 5: Solve for x
    x = 287,251.72/531.49
  6. Step 6: Final answer
    x = 540.47

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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.