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Finding the Fourth Proportional to 3,333.80, 5,000.70 and 2,799.20

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Solution

The fourth proportional to 3,333.80, 5,000.70 and 2,799.20 is: 4,198.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,333.80 : 5,000.70 = 2,799.20 : x
  2. Step 2: Convert to fraction form
    3,333.80/5,000.70 = 2,799.20/x
  3. Step 3: Cross multiply
    3,333.80x = 5,000.70 × 2,799.20
  4. Step 4: Simplify right side
    3,333.80x = 13,997,959.44
  5. Step 5: Solve for x
    x = 13,997,959.44/3,333.80
  6. Step 6: Final answer
    x = 4,198.80

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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.