Home / 2,712.40-4,077.30-2,519.80

Finding the Fourth Proportional to 2,712.40, 4,077.30 and 2,519.80

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Solution

The fourth proportional to 2,712.40, 4,077.30 and 2,519.80 is: 3,787.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,712.40 : 4,077.30 = 2,519.80 : x
  2. Step 2: Convert to fraction form
    2,712.40/4,077.30 = 2,519.80/x
  3. Step 3: Cross multiply
    2,712.40x = 4,077.30 × 2,519.80
  4. Step 4: Simplify right side
    2,712.40x = 10,273,980.54
  5. Step 5: Solve for x
    x = 10,273,980.54/2,712.40
  6. Step 6: Final answer
    x = 3,787.78

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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.