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Finding the Third Proportional to 200,978 and 319,918

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Solution

The third proportional to 200,978 and 319,918 is: 509,247.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,978 : 319,918 = 319,918 : x
  2. Step 2: Convert to fraction form
    200,978/319,918 = 319,918/x
  3. Step 3: Cross multiply
    200,978x = 319,918 × 319,918
  4. Step 4: Simplify right side
    200,978x = 102,347,526,724
  5. Step 5: Solve for x
    x = 102,347,526,724/200,978
  6. Step 6: Final answer
    x = 509,247.41

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These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.