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Finding the Fourth Proportional to 502.31, 753.88 and 213.95

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Solution

The fourth proportional to 502.31, 753.88 and 213.95 is: 321.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.31 : 753.88 = 213.95 : x
  2. Step 2: Convert to fraction form
    502.31/753.88 = 213.95/x
  3. Step 3: Cross multiply
    502.31x = 753.88 × 213.95
  4. Step 4: Simplify right side
    502.31x = 161,292.63
  5. Step 5: Solve for x
    x = 161,292.63/502.31
  6. Step 6: Final answer
    x = 321.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.