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Finding the Fourth Proportional to 363.84, 502.20 and 216.47

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Solution

The fourth proportional to 363.84, 502.20 and 216.47 is: 298.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.84 : 502.20 = 216.47 : x
  2. Step 2: Convert to fraction form
    363.84/502.20 = 216.47/x
  3. Step 3: Cross multiply
    363.84x = 502.20 × 216.47
  4. Step 4: Simplify right side
    363.84x = 108,708.72
  5. Step 5: Solve for x
    x = 108,708.72/363.84
  6. Step 6: Final answer
    x = 298.78

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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.