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Finding the Fourth Proportional to 220,879, 331,321.74 and 54,667

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Solution

The fourth proportional to 220,879, 331,321.74 and 54,667 is: 82,001.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,879 : 331,321.74 = 54,667 : x
  2. Step 2: Convert to fraction form
    220,879/331,321.74 = 54,667/x
  3. Step 3: Cross multiply
    220,879x = 331,321.74 × 54,667
  4. Step 4: Simplify right side
    220,879x = 18,112,365,560.58
  5. Step 5: Solve for x
    x = 18,112,365,560.58/220,879
  6. Step 6: Final answer
    x = 82,001.30

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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.