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Finding the Fourth Proportional to 6,600,836.56, 9,885,901.92 and 6,419,213.32

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Solution

The fourth proportional to 6,600,836.56, 9,885,901.92 and 6,419,213.32 is: 9,613,889.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,600,836.56 : 9,885,901.92 = 6,419,213.32 : x
  2. Step 2: Convert to fraction form
    6,600,836.56/9,885,901.92 = 6,419,213.32/x
  3. Step 3: Cross multiply
    6,600,836.56x = 9,885,901.92 × 6,419,213.32
  4. Step 4: Simplify right side
    6,600,836.56x = 63,459,713,285,077.58
  5. Step 5: Solve for x
    x = 63,459,713,285,077.58/6,600,836.56
  6. Step 6: Final answer
    x = 9,613,889.50

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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.