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Finding the Fourth Proportional to 6,648,788.98, 9,978,848.61 and 2,608,087.78

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Solution

The fourth proportional to 6,648,788.98, 9,978,848.61 and 2,608,087.78 is: 3,914,353.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,648,788.98 : 9,978,848.61 = 2,608,087.78 : x
  2. Step 2: Convert to fraction form
    6,648,788.98/9,978,848.61 = 2,608,087.78/x
  3. Step 3: Cross multiply
    6,648,788.98x = 9,978,848.61 × 2,608,087.78
  4. Step 4: Simplify right side
    6,648,788.98x = 26,025,713,118,210.98
  5. Step 5: Solve for x
    x = 26,025,713,118,210.98/6,648,788.98
  6. Step 6: Final answer
    x = 3,914,353.91

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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.