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Finding the Third Proportional to 668,405 and 1,391,889

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Solution

The third proportional to 668,405 and 1,391,889 is: 2,898,474.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,405 : 1,391,889 = 1,391,889 : x
  2. Step 2: Convert to fraction form
    668,405/1,391,889 = 1,391,889/x
  3. Step 3: Cross multiply
    668,405x = 1,391,889 × 1,391,889
  4. Step 4: Simplify right side
    668,405x = 1,937,354,988,321
  5. Step 5: Solve for x
    x = 1,937,354,988,321/668,405
  6. Step 6: Final answer
    x = 2,898,474.71

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.