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Finding the Third Proportional to 205.31 and 417.09

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Solution

The third proportional to 205.31 and 417.09 is: 847.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.31 : 417.09 = 417.09 : x
  2. Step 2: Convert to fraction form
    205.31/417.09 = 417.09/x
  3. Step 3: Cross multiply
    205.31x = 417.09 × 417.09
  4. Step 4: Simplify right side
    205.31x = 173,967.20
  5. Step 5: Solve for x
    x = 173,967.20/205.31
  6. Step 6: Final answer
    x = 847.33

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.