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Finding the Third Proportional to 515,924 and 781,676

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Solution

The third proportional to 515,924 and 781,676 is: 1,184,316.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,924 : 781,676 = 781,676 : x
  2. Step 2: Convert to fraction form
    515,924/781,676 = 781,676/x
  3. Step 3: Cross multiply
    515,924x = 781,676 × 781,676
  4. Step 4: Simplify right side
    515,924x = 611,017,368,976
  5. Step 5: Solve for x
    x = 611,017,368,976/515,924
  6. Step 6: Final answer
    x = 1,184,316.62

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.