Home / 2,686.92-4,028.34-1,387.56

Finding the Fourth Proportional to 2,686.92, 4,028.34 and 1,387.56

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Solution

The fourth proportional to 2,686.92, 4,028.34 and 1,387.56 is: 2,080.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.92 : 4,028.34 = 1,387.56 : x
  2. Step 2: Convert to fraction form
    2,686.92/4,028.34 = 1,387.56/x
  3. Step 3: Cross multiply
    2,686.92x = 4,028.34 × 1,387.56
  4. Step 4: Simplify right side
    2,686.92x = 5,589,563.45
  5. Step 5: Solve for x
    x = 5,589,563.45/2,686.92
  6. Step 6: Final answer
    x = 2,080.29

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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.