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Finding the Fourth Proportional to 998,641.92, 1,378,134 and 568,915.20

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Solution

The fourth proportional to 998,641.92, 1,378,134 and 568,915.20 is: 785,107.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    998,641.92 : 1,378,134 = 568,915.20 : x
  2. Step 2: Convert to fraction form
    998,641.92/1,378,134 = 568,915.20/x
  3. Step 3: Cross multiply
    998,641.92x = 1,378,134 × 568,915.20
  4. Step 4: Simplify right side
    998,641.92x = 784,041,380,236.80
  5. Step 5: Solve for x
    x = 784,041,380,236.80/998,641.92
  6. Step 6: Final answer
    x = 785,107.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.