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Finding the Fourth Proportional to 502.18, 693 and 281.13

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Solution

The fourth proportional to 502.18, 693 and 281.13 is: 387.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.18 : 693 = 281.13 : x
  2. Step 2: Convert to fraction form
    502.18/693 = 281.13/x
  3. Step 3: Cross multiply
    502.18x = 693 × 281.13
  4. Step 4: Simplify right side
    502.18x = 194,823.09
  5. Step 5: Solve for x
    x = 194,823.09/502.18
  6. Step 6: Final answer
    x = 387.95

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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.