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Finding the Fourth Proportional to 363.75, 545.63 and 89.85

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Solution

The fourth proportional to 363.75, 545.63 and 89.85 is: 134.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.75 : 545.63 = 89.85 : x
  2. Step 2: Convert to fraction form
    363.75/545.63 = 89.85/x
  3. Step 3: Cross multiply
    363.75x = 545.63 × 89.85
  4. Step 4: Simplify right side
    363.75x = 49,024.86
  5. Step 5: Solve for x
    x = 49,024.86/363.75
  6. Step 6: Final answer
    x = 134.78

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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.