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Finding the Fourth Proportional to 2,619,134.92, 3,928,750.98 and 821,978.20

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Solution

The fourth proportional to 2,619,134.92, 3,928,750.98 and 821,978.20 is: 1,232,982.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619,134.92 : 3,928,750.98 = 821,978.20 : x
  2. Step 2: Convert to fraction form
    2,619,134.92/3,928,750.98 = 821,978.20/x
  3. Step 3: Cross multiply
    2,619,134.92x = 3,928,750.98 × 821,978.20
  4. Step 4: Simplify right side
    2,619,134.92x = 3,229,347,658,788.64
  5. Step 5: Solve for x
    x = 3,229,347,658,788.64/2,619,134.92
  6. Step 6: Final answer
    x = 1,232,982.55

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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.