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Finding the Fourth Proportional to 531.38, 733.12 and 310.31

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Solution

The fourth proportional to 531.38, 733.12 and 310.31 is: 428.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.38 : 733.12 = 310.31 : x
  2. Step 2: Convert to fraction form
    531.38/733.12 = 310.31/x
  3. Step 3: Cross multiply
    531.38x = 733.12 × 310.31
  4. Step 4: Simplify right side
    531.38x = 227,491.19
  5. Step 5: Solve for x
    x = 227,491.19/531.38
  6. Step 6: Final answer
    x = 428.11

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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.