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Finding the Fourth Proportional to 363.61, 545.21 and 168.80

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Solution

The fourth proportional to 363.61, 545.21 and 168.80 is: 253.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.61 : 545.21 = 168.80 : x
  2. Step 2: Convert to fraction form
    363.61/545.21 = 168.80/x
  3. Step 3: Cross multiply
    363.61x = 545.21 × 168.80
  4. Step 4: Simplify right side
    363.61x = 92,031.97
  5. Step 5: Solve for x
    x = 92,031.97/363.61
  6. Step 6: Final answer
    x = 253.11

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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.