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Finding the Fourth Proportional to 3,219,747.20, 4,829,620.80 and 855,843.20

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Solution

The fourth proportional to 3,219,747.20, 4,829,620.80 and 855,843.20 is: 1,283,764.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219,747.20 : 4,829,620.80 = 855,843.20 : x
  2. Step 2: Convert to fraction form
    3,219,747.20/4,829,620.80 = 855,843.20/x
  3. Step 3: Cross multiply
    3,219,747.20x = 4,829,620.80 × 855,843.20
  4. Step 4: Simplify right side
    3,219,747.20x = 4,133,398,120,258.56
  5. Step 5: Solve for x
    x = 4,133,398,120,258.56/3,219,747.20
  6. Step 6: Final answer
    x = 1,283,764.80

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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.