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Finding the Fourth Proportional to 3,991,872.92, 5,987,723.45 and 1,113,163.11

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Solution

The fourth proportional to 3,991,872.92, 5,987,723.45 and 1,113,163.11 is: 1,669,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991,872.92 : 5,987,723.45 = 1,113,163.11 : x
  2. Step 2: Convert to fraction form
    3,991,872.92/5,987,723.45 = 1,113,163.11/x
  3. Step 3: Cross multiply
    3,991,872.92x = 5,987,723.45 × 1,113,163.11
  4. Step 4: Simplify right side
    3,991,872.92x = 6,665,312,851,856.12
  5. Step 5: Solve for x
    x = 6,665,312,851,856.12/3,991,872.92
  6. Step 6: Final answer
    x = 1,669,720.70

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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.