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Finding the Third Proportional to 394,129.50 and 816,283.50

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Solution

The third proportional to 394,129.50 and 816,283.50 is: 1,690,608.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,129.50 : 816,283.50 = 816,283.50 : x
  2. Step 2: Convert to fraction form
    394,129.50/816,283.50 = 816,283.50/x
  3. Step 3: Cross multiply
    394,129.50x = 816,283.50 × 816,283.50
  4. Step 4: Simplify right side
    394,129.50x = 666,318,752,372.25
  5. Step 5: Solve for x
    x = 666,318,752,372.25/394,129.50
  6. Step 6: Final answer
    x = 1,690,608.68

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.