Home / 2,861.38-3,947.07-1,682.20

Finding the Fourth Proportional to 2,861.38, 3,947.07 and 1,682.20

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Solution

The fourth proportional to 2,861.38, 3,947.07 and 1,682.20 is: 2,320.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.38 : 3,947.07 = 1,682.20 : x
  2. Step 2: Convert to fraction form
    2,861.38/3,947.07 = 1,682.20/x
  3. Step 3: Cross multiply
    2,861.38x = 3,947.07 × 1,682.20
  4. Step 4: Simplify right side
    2,861.38x = 6,639,761.15
  5. Step 5: Solve for x
    x = 6,639,761.15/2,861.38
  6. Step 6: Final answer
    x = 2,320.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.