Home / 3,843.80-5,765.69-2,199.20

Finding the Fourth Proportional to 3,843.80, 5,765.69 and 2,199.20

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Solution

The fourth proportional to 3,843.80, 5,765.69 and 2,199.20 is: 3,298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,843.80 : 5,765.69 = 2,199.20 : x
  2. Step 2: Convert to fraction form
    3,843.80/5,765.69 = 2,199.20/x
  3. Step 3: Cross multiply
    3,843.80x = 5,765.69 × 2,199.20
  4. Step 4: Simplify right side
    3,843.80x = 12,679,882.12
  5. Step 5: Solve for x
    x = 12,679,882.12/3,843.80
  6. Step 6: Final answer
    x = 3,298.79

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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.