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Finding the Third Proportional to 129,987,300 and 285,479,868

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Solution

The third proportional to 129,987,300 and 285,479,868 is: 626,974,750.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,987,300 : 285,479,868 = 285,479,868 : x
  2. Step 2: Convert to fraction form
    129,987,300/285,479,868 = 285,479,868/x
  3. Step 3: Cross multiply
    129,987,300x = 285,479,868 × 285,479,868
  4. Step 4: Simplify right side
    129,987,300x = 81,498,755,033,297,424
  5. Step 5: Solve for x
    x = 81,498,755,033,297,424/129,987,300
  6. Step 6: Final answer
    x = 626,974,750.87

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.