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Finding the Fourth Proportional to 223.39, 334.85 and 77.09

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Solution

The fourth proportional to 223.39, 334.85 and 77.09 is: 115.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.39 : 334.85 = 77.09 : x
  2. Step 2: Convert to fraction form
    223.39/334.85 = 77.09/x
  3. Step 3: Cross multiply
    223.39x = 334.85 × 77.09
  4. Step 4: Simplify right side
    223.39x = 25,811.96
  5. Step 5: Solve for x
    x = 25,811.96/223.39
  6. Step 6: Final answer
    x = 115.55

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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.