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Finding the Fourth Proportional to 502.95, 754.39 and 321.18

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Solution

The fourth proportional to 502.95, 754.39 and 321.18 is: 481.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.95 : 754.39 = 321.18 : x
  2. Step 2: Convert to fraction form
    502.95/754.39 = 321.18/x
  3. Step 3: Cross multiply
    502.95x = 754.39 × 321.18
  4. Step 4: Simplify right side
    502.95x = 242,294.98
  5. Step 5: Solve for x
    x = 242,294.98/502.95
  6. Step 6: Final answer
    x = 481.75

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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.