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Finding the Fourth Proportional to 363.55, 545.17 and 198.85

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Solution

The fourth proportional to 363.55, 545.17 and 198.85 is: 298.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.55 : 545.17 = 198.85 : x
  2. Step 2: Convert to fraction form
    363.55/545.17 = 198.85/x
  3. Step 3: Cross multiply
    363.55x = 545.17 × 198.85
  4. Step 4: Simplify right side
    363.55x = 108,407.05
  5. Step 5: Solve for x
    x = 108,407.05/363.55
  6. Step 6: Final answer
    x = 298.19

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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.