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Finding the Fourth Proportional to 408.68, 563.99 and 222.17

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Solution

The fourth proportional to 408.68, 563.99 and 222.17 is: 306.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.68 : 563.99 = 222.17 : x
  2. Step 2: Convert to fraction form
    408.68/563.99 = 222.17/x
  3. Step 3: Cross multiply
    408.68x = 563.99 × 222.17
  4. Step 4: Simplify right side
    408.68x = 125,301.96
  5. Step 5: Solve for x
    x = 125,301.96/408.68
  6. Step 6: Final answer
    x = 306.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.