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Finding the Third Proportional to 639,515.25 and 923,913

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Solution

The third proportional to 639,515.25 and 923,913 is: 1,334,784.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,515.25 : 923,913 = 923,913 : x
  2. Step 2: Convert to fraction form
    639,515.25/923,913 = 923,913/x
  3. Step 3: Cross multiply
    639,515.25x = 923,913 × 923,913
  4. Step 4: Simplify right side
    639,515.25x = 853,615,231,569
  5. Step 5: Solve for x
    x = 853,615,231,569/639,515.25
  6. Step 6: Final answer
    x = 1,334,784.79

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.