Home / 2,687.92-4,023.20-1,387.60

Finding the Fourth Proportional to 2,687.92, 4,023.20 and 1,387.60

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Solution

The fourth proportional to 2,687.92, 4,023.20 and 1,387.60 is: 2,076.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.92 : 4,023.20 = 1,387.60 : x
  2. Step 2: Convert to fraction form
    2,687.92/4,023.20 = 1,387.60/x
  3. Step 3: Cross multiply
    2,687.92x = 4,023.20 × 1,387.60
  4. Step 4: Simplify right side
    2,687.92x = 5,582,592.32
  5. Step 5: Solve for x
    x = 5,582,592.32/2,687.92
  6. Step 6: Final answer
    x = 2,076.92

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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.