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Finding the Third Proportional to 1,388,791,915 and 2,115,746,504

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Solution

The third proportional to 1,388,791,915 and 2,115,746,504 is: 3,223,221,002.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,791,915 : 2,115,746,504 = 2,115,746,504 : x
  2. Step 2: Convert to fraction form
    1,388,791,915/2,115,746,504 = 2,115,746,504/x
  3. Step 3: Cross multiply
    1,388,791,915x = 2,115,746,504 × 2,115,746,504
  4. Step 4: Simplify right side
    1,388,791,915x = 4,476,383,269,188,221,952
  5. Step 5: Solve for x
    x = 4,476,383,269,188,221,952/1,388,791,915
  6. Step 6: Final answer
    x = 3,223,221,002.97

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.