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Finding the Fourth Proportional to 3,198.80, 4,783.80 and 2,680.40

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Solution

The fourth proportional to 3,198.80, 4,783.80 and 2,680.40 is: 4,008.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,198.80 : 4,783.80 = 2,680.40 : x
  2. Step 2: Convert to fraction form
    3,198.80/4,783.80 = 2,680.40/x
  3. Step 3: Cross multiply
    3,198.80x = 4,783.80 × 2,680.40
  4. Step 4: Simplify right side
    3,198.80x = 12,822,497.52
  5. Step 5: Solve for x
    x = 12,822,497.52/3,198.80
  6. Step 6: Final answer
    x = 4,008.53

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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.