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Finding the Third Proportional to 320,523 and 685,515

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Solution

The third proportional to 320,523 and 685,515 is: 1,466,137.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,523 : 685,515 = 685,515 : x
  2. Step 2: Convert to fraction form
    320,523/685,515 = 685,515/x
  3. Step 3: Cross multiply
    320,523x = 685,515 × 685,515
  4. Step 4: Simplify right side
    320,523x = 469,930,815,225
  5. Step 5: Solve for x
    x = 469,930,815,225/320,523
  6. Step 6: Final answer
    x = 1,466,137.58

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.