Home / 3,119.80-4,679.70-2,198.20

Finding the Fourth Proportional to 3,119.80, 4,679.70 and 2,198.20

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Solution

The fourth proportional to 3,119.80, 4,679.70 and 2,198.20 is: 3,297.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.80 : 4,679.70 = 2,198.20 : x
  2. Step 2: Convert to fraction form
    3,119.80/4,679.70 = 2,198.20/x
  3. Step 3: Cross multiply
    3,119.80x = 4,679.70 × 2,198.20
  4. Step 4: Simplify right side
    3,119.80x = 10,286,916.54
  5. Step 5: Solve for x
    x = 10,286,916.54/3,119.80
  6. Step 6: Final answer
    x = 3,297.30

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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.