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Finding the Fourth Proportional to 1,998,619.20, 2,994,429.60 and 1,641,700.80

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Solution

The fourth proportional to 1,998,619.20, 2,994,429.60 and 1,641,700.80 is: 2,459,676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998,619.20 : 2,994,429.60 = 1,641,700.80 : x
  2. Step 2: Convert to fraction form
    1,998,619.20/2,994,429.60 = 1,641,700.80/x
  3. Step 3: Cross multiply
    1,998,619.20x = 2,994,429.60 × 1,641,700.80
  4. Step 4: Simplify right side
    1,998,619.20x = 4,915,957,469,863.68
  5. Step 5: Solve for x
    x = 4,915,957,469,863.68/1,998,619.20
  6. Step 6: Final answer
    x = 2,459,676.90

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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.