Home / 5,198.80-7,172.30-3,205.90

Finding the Fourth Proportional to 5,198.80, 7,172.30 and 3,205.90

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Solution

The fourth proportional to 5,198.80, 7,172.30 and 3,205.90 is: 4,422.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,198.80 : 7,172.30 = 3,205.90 : x
  2. Step 2: Convert to fraction form
    5,198.80/7,172.30 = 3,205.90/x
  3. Step 3: Cross multiply
    5,198.80x = 7,172.30 × 3,205.90
  4. Step 4: Simplify right side
    5,198.80x = 22,993,666.65
  5. Step 5: Solve for x
    x = 22,993,666.65/5,198.80
  6. Step 6: Final answer
    x = 4,422.88

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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.