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Finding the Third Proportional to 640,481 and 1,379,926

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Solution

The third proportional to 640,481 and 1,379,926 is: 2,973,071.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,481 : 1,379,926 = 1,379,926 : x
  2. Step 2: Convert to fraction form
    640,481/1,379,926 = 1,379,926/x
  3. Step 3: Cross multiply
    640,481x = 1,379,926 × 1,379,926
  4. Step 4: Simplify right side
    640,481x = 1,904,195,765,476
  5. Step 5: Solve for x
    x = 1,904,195,765,476/640,481
  6. Step 6: Final answer
    x = 2,973,071.43

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.