Home / 2,778.31-4,163.92-1,217.90

Finding the Fourth Proportional to 2,778.31, 4,163.92 and 1,217.90

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Solution

The fourth proportional to 2,778.31, 4,163.92 and 1,217.90 is: 1,825.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.31 : 4,163.92 = 1,217.90 : x
  2. Step 2: Convert to fraction form
    2,778.31/4,163.92 = 1,217.90/x
  3. Step 3: Cross multiply
    2,778.31x = 4,163.92 × 1,217.90
  4. Step 4: Simplify right side
    2,778.31x = 5,071,211.26
  5. Step 5: Solve for x
    x = 5,071,211.26/2,778.31
  6. Step 6: Final answer
    x = 1,825.29

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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.