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Finding the Fourth Proportional to 4,321.92, 6,481.80 and 1,243.92

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Solution

The fourth proportional to 4,321.92, 6,481.80 and 1,243.92 is: 1,865.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,321.92 : 6,481.80 = 1,243.92 : x
  2. Step 2: Convert to fraction form
    4,321.92/6,481.80 = 1,243.92/x
  3. Step 3: Cross multiply
    4,321.92x = 6,481.80 × 1,243.92
  4. Step 4: Simplify right side
    4,321.92x = 8,062,840.66
  5. Step 5: Solve for x
    x = 8,062,840.66/4,321.92
  6. Step 6: Final answer
    x = 1,865.57

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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.