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Finding the Third Proportional to 339,856 and 509,912

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Solution

The third proportional to 339,856 and 509,912 is: 765,060.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,856 : 509,912 = 509,912 : x
  2. Step 2: Convert to fraction form
    339,856/509,912 = 509,912/x
  3. Step 3: Cross multiply
    339,856x = 509,912 × 509,912
  4. Step 4: Simplify right side
    339,856x = 260,010,247,744
  5. Step 5: Solve for x
    x = 260,010,247,744/339,856
  6. Step 6: Final answer
    x = 765,060.05

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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.