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Finding the Third Proportional to 217.13 and 442.31

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Solution

The third proportional to 217.13 and 442.31 is: 901.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.13 : 442.31 = 442.31 : x
  2. Step 2: Convert to fraction form
    217.13/442.31 = 442.31/x
  3. Step 3: Cross multiply
    217.13x = 442.31 × 442.31
  4. Step 4: Simplify right side
    217.13x = 195,640.35
  5. Step 5: Solve for x
    x = 195,640.35/217.13
  6. Step 6: Final answer
    x = 901.05

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.