Home / 2,576.31-3,864.10-1,115.28

Finding the Fourth Proportional to 2,576.31, 3,864.10 and 1,115.28

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Solution

The fourth proportional to 2,576.31, 3,864.10 and 1,115.28 is: 1,672.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,576.31 : 3,864.10 = 1,115.28 : x
  2. Step 2: Convert to fraction form
    2,576.31/3,864.10 = 1,115.28/x
  3. Step 3: Cross multiply
    2,576.31x = 3,864.10 × 1,115.28
  4. Step 4: Simplify right side
    2,576.31x = 4,309,553.45
  5. Step 5: Solve for x
    x = 4,309,553.45/2,576.31
  6. Step 6: Final answer
    x = 1,672.76

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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.