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Finding the Fourth Proportional to 363.95, 502.46 and 280.89

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Solution

The fourth proportional to 363.95, 502.46 and 280.89 is: 387.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.95 : 502.46 = 280.89 : x
  2. Step 2: Convert to fraction form
    363.95/502.46 = 280.89/x
  3. Step 3: Cross multiply
    363.95x = 502.46 × 280.89
  4. Step 4: Simplify right side
    363.95x = 141,134.58
  5. Step 5: Solve for x
    x = 141,134.58/363.95
  6. Step 6: Final answer
    x = 387.79

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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.