Home / 2,761.20-4,139.10-1,373.40

Finding the Fourth Proportional to 2,761.20, 4,139.10 and 1,373.40

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Solution

The fourth proportional to 2,761.20, 4,139.10 and 1,373.40 is: 2,058.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.20 : 4,139.10 = 1,373.40 : x
  2. Step 2: Convert to fraction form
    2,761.20/4,139.10 = 1,373.40/x
  3. Step 3: Cross multiply
    2,761.20x = 4,139.10 × 1,373.40
  4. Step 4: Simplify right side
    2,761.20x = 5,684,639.94
  5. Step 5: Solve for x
    x = 5,684,639.94/2,761.20
  6. Step 6: Final answer
    x = 2,058.76

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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.