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Finding the Third Proportional to 679,631 and 1,079,715

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Solution

The third proportional to 679,631 and 1,079,715 is: 1,715,319.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,631 : 1,079,715 = 1,079,715 : x
  2. Step 2: Convert to fraction form
    679,631/1,079,715 = 1,079,715/x
  3. Step 3: Cross multiply
    679,631x = 1,079,715 × 1,079,715
  4. Step 4: Simplify right side
    679,631x = 1,165,784,481,225
  5. Step 5: Solve for x
    x = 1,165,784,481,225/679,631
  6. Step 6: Final answer
    x = 1,715,319.76

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.