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Finding the Third Proportional to 200,655 and 417,917

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Solution

The third proportional to 200,655 and 417,917 is: 870,422.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,655 : 417,917 = 417,917 : x
  2. Step 2: Convert to fraction form
    200,655/417,917 = 417,917/x
  3. Step 3: Cross multiply
    200,655x = 417,917 × 417,917
  4. Step 4: Simplify right side
    200,655x = 174,654,618,889
  5. Step 5: Solve for x
    x = 174,654,618,889/200,655
  6. Step 6: Final answer
    x = 870,422.46

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.