Home / 3,128.80-4,691.28-1,076.96

Finding the Fourth Proportional to 3,128.80, 4,691.28 and 1,076.96

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Solution

The fourth proportional to 3,128.80, 4,691.28 and 1,076.96 is: 1,614.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.80 : 4,691.28 = 1,076.96 : x
  2. Step 2: Convert to fraction form
    3,128.80/4,691.28 = 1,076.96/x
  3. Step 3: Cross multiply
    3,128.80x = 4,691.28 × 1,076.96
  4. Step 4: Simplify right side
    3,128.80x = 5,052,320.91
  5. Step 5: Solve for x
    x = 5,052,320.91/3,128.80
  6. Step 6: Final answer
    x = 1,614.78

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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.