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Finding the Fourth Proportional to 363.94, 502.15 and 216.55

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Solution

The fourth proportional to 363.94, 502.15 and 216.55 is: 298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.94 : 502.15 = 216.55 : x
  2. Step 2: Convert to fraction form
    363.94/502.15 = 216.55/x
  3. Step 3: Cross multiply
    363.94x = 502.15 × 216.55
  4. Step 4: Simplify right side
    363.94x = 108,740.58
  5. Step 5: Solve for x
    x = 108,740.58/363.94
  6. Step 6: Final answer
    x = 298.79

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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.