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Finding the Fourth Proportional to 363.48, 545.48 and 218.76

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Solution

The fourth proportional to 363.48, 545.48 and 218.76 is: 328.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.48 : 545.48 = 218.76 : x
  2. Step 2: Convert to fraction form
    363.48/545.48 = 218.76/x
  3. Step 3: Cross multiply
    363.48x = 545.48 × 218.76
  4. Step 4: Simplify right side
    363.48x = 119,329.20
  5. Step 5: Solve for x
    x = 119,329.20/363.48
  6. Step 6: Final answer
    x = 328.30

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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.