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Finding the Third Proportional to 840,978 and 1,261,203

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Solution

The third proportional to 840,978 and 1,261,203 is: 1,891,408.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,978 : 1,261,203 = 1,261,203 : x
  2. Step 2: Convert to fraction form
    840,978/1,261,203 = 1,261,203/x
  3. Step 3: Cross multiply
    840,978x = 1,261,203 × 1,261,203
  4. Step 4: Simplify right side
    840,978x = 1,590,633,007,209
  5. Step 5: Solve for x
    x = 1,590,633,007,209/840,978
  6. Step 6: Final answer
    x = 1,891,408.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.