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Finding the Third Proportional to 489,389 and 689,181

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Solution

The third proportional to 489,389 and 689,181 is: 970,537.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,389 : 689,181 = 689,181 : x
  2. Step 2: Convert to fraction form
    489,389/689,181 = 689,181/x
  3. Step 3: Cross multiply
    489,389x = 689,181 × 689,181
  4. Step 4: Simplify right side
    489,389x = 474,970,450,761
  5. Step 5: Solve for x
    x = 474,970,450,761/489,389
  6. Step 6: Final answer
    x = 970,537.65

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These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.