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Finding the Third Proportional to 436,806 and 640,689

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Solution

The third proportional to 436,806 and 640,689 is: 939,736.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,806 : 640,689 = 640,689 : x
  2. Step 2: Convert to fraction form
    436,806/640,689 = 640,689/x
  3. Step 3: Cross multiply
    436,806x = 640,689 × 640,689
  4. Step 4: Simplify right side
    436,806x = 410,482,394,721
  5. Step 5: Solve for x
    x = 410,482,394,721/436,806
  6. Step 6: Final answer
    x = 939,736.16

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.