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Finding the Third Proportional to 279.38 and 440.25

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Solution

The third proportional to 279.38 and 440.25 is: 693.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.38 : 440.25 = 440.25 : x
  2. Step 2: Convert to fraction form
    279.38/440.25 = 440.25/x
  3. Step 3: Cross multiply
    279.38x = 440.25 × 440.25
  4. Step 4: Simplify right side
    279.38x = 193,820.06
  5. Step 5: Solve for x
    x = 193,820.06/279.38
  6. Step 6: Final answer
    x = 693.76

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.