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Finding the Third Proportional to 387,109 and 789,770

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Solution

The third proportional to 387,109 and 789,770 is: 1,611,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,109 : 789,770 = 789,770 : x
  2. Step 2: Convert to fraction form
    387,109/789,770 = 789,770/x
  3. Step 3: Cross multiply
    387,109x = 789,770 × 789,770
  4. Step 4: Simplify right side
    387,109x = 623,736,652,900
  5. Step 5: Solve for x
    x = 623,736,652,900/387,109
  6. Step 6: Final answer
    x = 1,611,268.80

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.