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Finding the Third Proportional to 143,739 and 312,606

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Solution

The third proportional to 143,739 and 312,606 is: 679,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,739 : 312,606 = 312,606 : x
  2. Step 2: Convert to fraction form
    143,739/312,606 = 312,606/x
  3. Step 3: Cross multiply
    143,739x = 312,606 × 312,606
  4. Step 4: Simplify right side
    143,739x = 97,722,511,236
  5. Step 5: Solve for x
    x = 97,722,511,236/143,739
  6. Step 6: Final answer
    x = 679,860.80

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.