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Finding the Fourth Proportional to 363.95, 545.37 and 311.61

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Solution

The fourth proportional to 363.95, 545.37 and 311.61 is: 466.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.95 : 545.37 = 311.61 : x
  2. Step 2: Convert to fraction form
    363.95/545.37 = 311.61/x
  3. Step 3: Cross multiply
    363.95x = 545.37 × 311.61
  4. Step 4: Simplify right side
    363.95x = 169,940.02
  5. Step 5: Solve for x
    x = 169,940.02/363.95
  6. Step 6: Final answer
    x = 466.94

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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.