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Finding the Fourth Proportional to 411.11, 616.80 and 216.17

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Solution

The fourth proportional to 411.11, 616.80 and 216.17 is: 324.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.11 : 616.80 = 216.17 : x
  2. Step 2: Convert to fraction form
    411.11/616.80 = 216.17/x
  3. Step 3: Cross multiply
    411.11x = 616.80 × 216.17
  4. Step 4: Simplify right side
    411.11x = 133,330.57
  5. Step 5: Solve for x
    x = 133,330.57/411.11
  6. Step 6: Final answer
    x = 324.32

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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.