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Finding the Fourth Proportional to 363.18, 545.19 and 286.38

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Solution

The fourth proportional to 363.18, 545.19 and 286.38 is: 429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.18 : 545.19 = 286.38 : x
  2. Step 2: Convert to fraction form
    363.18/545.19 = 286.38/x
  3. Step 3: Cross multiply
    363.18x = 545.19 × 286.38
  4. Step 4: Simplify right side
    363.18x = 156,131.51
  5. Step 5: Solve for x
    x = 156,131.51/363.18
  6. Step 6: Final answer
    x = 429.90

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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.