Home / 3,979.40-5,494.10-2,722.55

Finding the Fourth Proportional to 3,979.40, 5,494.10 and 2,722.55

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Solution

The fourth proportional to 3,979.40, 5,494.10 and 2,722.55 is: 3,758.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.40 : 5,494.10 = 2,722.55 : x
  2. Step 2: Convert to fraction form
    3,979.40/5,494.10 = 2,722.55/x
  3. Step 3: Cross multiply
    3,979.40x = 5,494.10 × 2,722.55
  4. Step 4: Simplify right side
    3,979.40x = 14,957,920.87
  5. Step 5: Solve for x
    x = 14,957,920.87/3,979.40
  6. Step 6: Final answer
    x = 3,758.84

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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.