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Finding the Fourth Proportional to 223.46, 335.22 and 77.18

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Solution

The fourth proportional to 223.46, 335.22 and 77.18 is: 115.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.46 : 335.22 = 77.18 : x
  2. Step 2: Convert to fraction form
    223.46/335.22 = 77.18/x
  3. Step 3: Cross multiply
    223.46x = 335.22 × 77.18
  4. Step 4: Simplify right side
    223.46x = 25,872.28
  5. Step 5: Solve for x
    x = 25,872.28/223.46
  6. Step 6: Final answer
    x = 115.78

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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.