Home / 2,800.25-3,861.79-2,168.76

Finding the Fourth Proportional to 2,800.25, 3,861.79 and 2,168.76

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Solution

The fourth proportional to 2,800.25, 3,861.79 and 2,168.76 is: 2,990.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.25 : 3,861.79 = 2,168.76 : x
  2. Step 2: Convert to fraction form
    2,800.25/3,861.79 = 2,168.76/x
  3. Step 3: Cross multiply
    2,800.25x = 3,861.79 × 2,168.76
  4. Step 4: Simplify right side
    2,800.25x = 8,375,295.68
  5. Step 5: Solve for x
    x = 8,375,295.68/2,800.25
  6. Step 6: Final answer
    x = 2,990.91

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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.