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Finding the Third Proportional to 1,978 and 4,226

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Solution

The third proportional to 1,978 and 4,226 is: 9,028.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978 : 4,226 = 4,226 : x
  2. Step 2: Convert to fraction form
    1,978/4,226 = 4,226/x
  3. Step 3: Cross multiply
    1,978x = 4,226 × 4,226
  4. Step 4: Simplify right side
    1,978x = 17,859,076
  5. Step 5: Solve for x
    x = 17,859,076/1,978
  6. Step 6: Final answer
    x = 9,028.86

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