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Finding the Third Proportional to 269.75 and 427.38

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Solution

The third proportional to 269.75 and 427.38 is: 677.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.75 : 427.38 = 427.38 : x
  2. Step 2: Convert to fraction form
    269.75/427.38 = 427.38/x
  3. Step 3: Cross multiply
    269.75x = 427.38 × 427.38
  4. Step 4: Simplify right side
    269.75x = 182,649.39
  5. Step 5: Solve for x
    x = 182,649.39/269.75
  6. Step 6: Final answer
    x = 677.11

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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.