Home / 2,138.20-3,206.18-1,260.97

Finding the Fourth Proportional to 2,138.20, 3,206.18 and 1,260.97

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Solution

The fourth proportional to 2,138.20, 3,206.18 and 1,260.97 is: 1,890.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.20 : 3,206.18 = 1,260.97 : x
  2. Step 2: Convert to fraction form
    2,138.20/3,206.18 = 1,260.97/x
  3. Step 3: Cross multiply
    2,138.20x = 3,206.18 × 1,260.97
  4. Step 4: Simplify right side
    2,138.20x = 4,042,891.93
  5. Step 5: Solve for x
    x = 4,042,891.93/2,138.20
  6. Step 6: Final answer
    x = 1,890.79

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1.5x scale

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.