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Finding the Third Proportional to 315,918 and 682,416

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Solution

The third proportional to 315,918 and 682,416 is: 1,474,090.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,918 : 682,416 = 682,416 : x
  2. Step 2: Convert to fraction form
    315,918/682,416 = 682,416/x
  3. Step 3: Cross multiply
    315,918x = 682,416 × 682,416
  4. Step 4: Simplify right side
    315,918x = 465,691,597,056
  5. Step 5: Solve for x
    x = 465,691,597,056/315,918
  6. Step 6: Final answer
    x = 1,474,090.10

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.