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Finding the Fourth Proportional to 531.45, 733.50 and 310.55

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Solution

The fourth proportional to 531.45, 733.50 and 310.55 is: 428.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.45 : 733.50 = 310.55 : x
  2. Step 2: Convert to fraction form
    531.45/733.50 = 310.55/x
  3. Step 3: Cross multiply
    531.45x = 733.50 × 310.55
  4. Step 4: Simplify right side
    531.45x = 227,784.76
  5. Step 5: Solve for x
    x = 227,784.76/531.45
  6. Step 6: Final answer
    x = 428.61

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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.