Home / 3,481.92-5,218.72-1,289.60

Finding the Fourth Proportional to 3,481.92, 5,218.72 and 1,289.60

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Solution

The fourth proportional to 3,481.92, 5,218.72 and 1,289.60 is: 1,932.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,481.92 : 5,218.72 = 1,289.60 : x
  2. Step 2: Convert to fraction form
    3,481.92/5,218.72 = 1,289.60/x
  3. Step 3: Cross multiply
    3,481.92x = 5,218.72 × 1,289.60
  4. Step 4: Simplify right side
    3,481.92x = 6,730,061.31
  5. Step 5: Solve for x
    x = 6,730,061.31/3,481.92
  6. Step 6: Final answer
    x = 1,932.86

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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.