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Finding the Third Proportional to 439.25 and 939.25

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Solution

The third proportional to 439.25 and 939.25 is: 2,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.25 : 939.25 = 939.25 : x
  2. Step 2: Convert to fraction form
    439.25/939.25 = 939.25/x
  3. Step 3: Cross multiply
    439.25x = 939.25 × 939.25
  4. Step 4: Simplify right side
    439.25x = 882,190.56
  5. Step 5: Solve for x
    x = 882,190.56/439.25
  6. Step 6: Final answer
    x = 2,008.40

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.