Home / 2,120.20-3,179.96-1,337.82

Finding the Fourth Proportional to 2,120.20, 3,179.96 and 1,337.82

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Solution

The fourth proportional to 2,120.20, 3,179.96 and 1,337.82 is: 2,006.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.20 : 3,179.96 = 1,337.82 : x
  2. Step 2: Convert to fraction form
    2,120.20/3,179.96 = 1,337.82/x
  3. Step 3: Cross multiply
    2,120.20x = 3,179.96 × 1,337.82
  4. Step 4: Simplify right side
    2,120.20x = 4,254,200.49
  5. Step 5: Solve for x
    x = 4,254,200.49/2,120.20
  6. Step 6: Final answer
    x = 2,006.51

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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.