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Finding the Third Proportional to 178,857 and 393,012

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Solution

The third proportional to 178,857 and 393,012 is: 863,586.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,857 : 393,012 = 393,012 : x
  2. Step 2: Convert to fraction form
    178,857/393,012 = 393,012/x
  3. Step 3: Cross multiply
    178,857x = 393,012 × 393,012
  4. Step 4: Simplify right side
    178,857x = 154,458,432,144
  5. Step 5: Solve for x
    x = 154,458,432,144/178,857
  6. Step 6: Final answer
    x = 863,586.17

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.