Home / 5,122.30-7,679.40-2,198.20

Finding the Fourth Proportional to 5,122.30, 7,679.40 and 2,198.20

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Solution

The fourth proportional to 5,122.30, 7,679.40 and 2,198.20 is: 3,295.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,122.30 : 7,679.40 = 2,198.20 : x
  2. Step 2: Convert to fraction form
    5,122.30/7,679.40 = 2,198.20/x
  3. Step 3: Cross multiply
    5,122.30x = 7,679.40 × 2,198.20
  4. Step 4: Simplify right side
    5,122.30x = 16,880,857.08
  5. Step 5: Solve for x
    x = 16,880,857.08/5,122.30
  6. Step 6: Final answer
    x = 3,295.56

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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.