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Finding the Fourth Proportional to 5,979,940.80, 8,969,911.20 and 5,518,046.40

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Solution

The fourth proportional to 5,979,940.80, 8,969,911.20 and 5,518,046.40 is: 8,277,069.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,979,940.80 : 8,969,911.20 = 5,518,046.40 : x
  2. Step 2: Convert to fraction form
    5,979,940.80/8,969,911.20 = 5,518,046.40/x
  3. Step 3: Cross multiply
    5,979,940.80x = 8,969,911.20 × 5,518,046.40
  4. Step 4: Simplify right side
    5,979,940.80x = 49,496,386,205,479.68
  5. Step 5: Solve for x
    x = 49,496,386,205,479.68/5,979,940.80
  6. Step 6: Final answer
    x = 8,277,069.60

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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.