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Finding the Third Proportional to 439.50 and 939.75

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Solution

The third proportional to 439.50 and 939.75 is: 2,009.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.50 : 939.75 = 939.75 : x
  2. Step 2: Convert to fraction form
    439.50/939.75 = 939.75/x
  3. Step 3: Cross multiply
    439.50x = 939.75 × 939.75
  4. Step 4: Simplify right side
    439.50x = 883,130.06
  5. Step 5: Solve for x
    x = 883,130.06/439.50
  6. Step 6: Final answer
    x = 2,009.40

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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.