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Finding the Third Proportional to 313,644 and 679,128

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Solution

The third proportional to 313,644 and 679,128 is: 1,470,504.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,644 : 679,128 = 679,128 : x
  2. Step 2: Convert to fraction form
    313,644/679,128 = 679,128/x
  3. Step 3: Cross multiply
    313,644x = 679,128 × 679,128
  4. Step 4: Simplify right side
    313,644x = 461,214,840,384
  5. Step 5: Solve for x
    x = 461,214,840,384/313,644
  6. Step 6: Final answer
    x = 1,470,504.27

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.