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Finding the Fourth Proportional to 6,379,805.20, 9,571,397.40 and 2,784,029.20

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Solution

The fourth proportional to 6,379,805.20, 9,571,397.40 and 2,784,029.20 is: 4,176,781.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,379,805.20 : 9,571,397.40 = 2,784,029.20 : x
  2. Step 2: Convert to fraction form
    6,379,805.20/9,571,397.40 = 2,784,029.20/x
  3. Step 3: Cross multiply
    6,379,805.20x = 9,571,397.40 × 2,784,029.20
  4. Step 4: Simplify right side
    6,379,805.20x = 26,647,049,846,404.08
  5. Step 5: Solve for x
    x = 26,647,049,846,404.08/6,379,805.20
  6. Step 6: Final answer
    x = 4,176,781.11

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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.