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Finding the Third Proportional to 276,815 and 433,675

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Solution

The third proportional to 276,815 and 433,675 is: 679,421.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,815 : 433,675 = 433,675 : x
  2. Step 2: Convert to fraction form
    276,815/433,675 = 433,675/x
  3. Step 3: Cross multiply
    276,815x = 433,675 × 433,675
  4. Step 4: Simplify right side
    276,815x = 188,074,005,625
  5. Step 5: Solve for x
    x = 188,074,005,625/276,815
  6. Step 6: Final answer
    x = 679,421.29

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.