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Finding the Fourth Proportional to 410.92, 616.20 and 218.68

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Solution

The fourth proportional to 410.92, 616.20 and 218.68 is: 327.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.92 : 616.20 = 218.68 : x
  2. Step 2: Convert to fraction form
    410.92/616.20 = 218.68/x
  3. Step 3: Cross multiply
    410.92x = 616.20 × 218.68
  4. Step 4: Simplify right side
    410.92x = 134,750.62
  5. Step 5: Solve for x
    x = 134,750.62/410.92
  6. Step 6: Final answer
    x = 327.92

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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.