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Finding the Third Proportional to 200,979 and 310,917

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Solution

The third proportional to 200,979 and 310,917 is: 480,992.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,979 : 310,917 = 310,917 : x
  2. Step 2: Convert to fraction form
    200,979/310,917 = 310,917/x
  3. Step 3: Cross multiply
    200,979x = 310,917 × 310,917
  4. Step 4: Simplify right side
    200,979x = 96,669,380,889
  5. Step 5: Solve for x
    x = 96,669,380,889/200,979
  6. Step 6: Final answer
    x = 480,992.45

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.