Home / 2,721.29-4,087.19-2,415.78

Finding the Fourth Proportional to 2,721.29, 4,087.19 and 2,415.78

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Solution

The fourth proportional to 2,721.29, 4,087.19 and 2,415.78 is: 3,628.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.29 : 4,087.19 = 2,415.78 : x
  2. Step 2: Convert to fraction form
    2,721.29/4,087.19 = 2,415.78/x
  3. Step 3: Cross multiply
    2,721.29x = 4,087.19 × 2,415.78
  4. Step 4: Simplify right side
    2,721.29x = 9,873,757.90
  5. Step 5: Solve for x
    x = 9,873,757.90/2,721.29
  6. Step 6: Final answer
    x = 3,628.34

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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.