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Finding the Third Proportional to 911,979 and 1,979,721

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Solution

The third proportional to 911,979 and 1,979,721 is: 4,297,571.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,979 : 1,979,721 = 1,979,721 : x
  2. Step 2: Convert to fraction form
    911,979/1,979,721 = 1,979,721/x
  3. Step 3: Cross multiply
    911,979x = 1,979,721 × 1,979,721
  4. Step 4: Simplify right side
    911,979x = 3,919,295,237,841
  5. Step 5: Solve for x
    x = 3,919,295,237,841/911,979
  6. Step 6: Final answer
    x = 4,297,571.81

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.