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Finding the Fourth Proportional to 258,979,626.40, 388,469,439.60 and 258,979,626.40

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Solution

The fourth proportional to 258,979,626.40, 388,469,439.60 and 258,979,626.40 is: 388,469,439.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,979,626.40 : 388,469,439.60 = 258,979,626.40 : x
  2. Step 2: Convert to fraction form
    258,979,626.40/388,469,439.60 = 258,979,626.40/x
  3. Step 3: Cross multiply
    258,979,626.40x = 388,469,439.60 × 258,979,626.40
  4. Step 4: Simplify right side
    258,979,626.40x = 100,605,670,335,425,376
  5. Step 5: Solve for x
    x = 100,605,670,335,425,376/258,979,626.40
  6. Step 6: Final answer
    x = 388,469,439.60

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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.