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Finding the Fourth Proportional to 3,969,863.70, 5,954,795.55 and 3,603,759.90

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Solution

The fourth proportional to 3,969,863.70, 5,954,795.55 and 3,603,759.90 is: 5,405,639.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969,863.70 : 5,954,795.55 = 3,603,759.90 : x
  2. Step 2: Convert to fraction form
    3,969,863.70/5,954,795.55 = 3,603,759.90/x
  3. Step 3: Cross multiply
    3,969,863.70x = 5,954,795.55 × 3,603,759.90
  4. Step 4: Simplify right side
    3,969,863.70x = 21,459,653,415,788.45
  5. Step 5: Solve for x
    x = 21,459,653,415,788.45/3,969,863.70
  6. Step 6: Final answer
    x = 5,405,639.85

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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.