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Finding the Fourth Proportional to 3,991.33, 5,975.65 and 2,688.85

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Solution

The fourth proportional to 3,991.33, 5,975.65 and 2,688.85 is: 4,025.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.33 : 5,975.65 = 2,688.85 : x
  2. Step 2: Convert to fraction form
    3,991.33/5,975.65 = 2,688.85/x
  3. Step 3: Cross multiply
    3,991.33x = 5,975.65 × 2,688.85
  4. Step 4: Simplify right side
    3,991.33x = 16,067,626.50
  5. Step 5: Solve for x
    x = 16,067,626.50/3,991.33
  6. Step 6: Final answer
    x = 4,025.63

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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.