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Finding the Third Proportional to 878,445 and 1,917,999

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Solution

The third proportional to 878,445 and 1,917,999 is: 4,187,763.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,445 : 1,917,999 = 1,917,999 : x
  2. Step 2: Convert to fraction form
    878,445/1,917,999 = 1,917,999/x
  3. Step 3: Cross multiply
    878,445x = 1,917,999 × 1,917,999
  4. Step 4: Simplify right side
    878,445x = 3,678,720,164,001
  5. Step 5: Solve for x
    x = 3,678,720,164,001/878,445
  6. Step 6: Final answer
    x = 4,187,763.79

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.