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Finding the Fourth Proportional to 2,747.86, 4,122.40 and 799.90

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Solution

The fourth proportional to 2,747.86, 4,122.40 and 799.90 is: 1,200.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,747.86 : 4,122.40 = 799.90 : x
  2. Step 2: Convert to fraction form
    2,747.86/4,122.40 = 799.90/x
  3. Step 3: Cross multiply
    2,747.86x = 4,122.40 × 799.90
  4. Step 4: Simplify right side
    2,747.86x = 3,297,507.76
  5. Step 5: Solve for x
    x = 3,297,507.76/2,747.86
  6. Step 6: Final answer
    x = 1,200.03

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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.