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Finding the Fourth Proportional to 445,861,519.20, 668,792,278.80 and 445,861,519.20

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Solution

The fourth proportional to 445,861,519.20, 668,792,278.80 and 445,861,519.20 is: 668,792,278.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,861,519.20 : 668,792,278.80 = 445,861,519.20 : x
  2. Step 2: Convert to fraction form
    445,861,519.20/668,792,278.80 = 445,861,519.20/x
  3. Step 3: Cross multiply
    445,861,519.20x = 668,792,278.80 × 445,861,519.20
  4. Step 4: Simplify right side
    445,861,519.20x = 298,188,741,454,997,952
  5. Step 5: Solve for x
    x = 298,188,741,454,997,952/445,861,519.20
  6. Step 6: Final answer
    x = 668,792,278.80

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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.