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Finding the Fourth Proportional to 363.57, 545.15 and 171.20

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Solution

The fourth proportional to 363.57, 545.15 and 171.20 is: 256.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.57 : 545.15 = 171.20 : x
  2. Step 2: Convert to fraction form
    363.57/545.15 = 171.20/x
  3. Step 3: Cross multiply
    363.57x = 545.15 × 171.20
  4. Step 4: Simplify right side
    363.57x = 93,326.10
  5. Step 5: Solve for x
    x = 93,326.10/363.57
  6. Step 6: Final answer
    x = 256.69

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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.