Home / 3,976.40-5,489.96-2,719.55

Finding the Fourth Proportional to 3,976.40, 5,489.96 and 2,719.55

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Solution

The fourth proportional to 3,976.40, 5,489.96 and 2,719.55 is: 3,754.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,976.40 : 5,489.96 = 2,719.55 : x
  2. Step 2: Convert to fraction form
    3,976.40/5,489.96 = 2,719.55/x
  3. Step 3: Cross multiply
    3,976.40x = 5,489.96 × 2,719.55
  4. Step 4: Simplify right side
    3,976.40x = 14,930,179.67
  5. Step 5: Solve for x
    x = 14,930,179.67/3,976.40
  6. Step 6: Final answer
    x = 3,754.70

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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.