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Finding the Third Proportional to 178,859 and 393,016

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Solution

The third proportional to 178,859 and 393,016 is: 863,594.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,859 : 393,016 = 393,016 : x
  2. Step 2: Convert to fraction form
    178,859/393,016 = 393,016/x
  3. Step 3: Cross multiply
    178,859x = 393,016 × 393,016
  4. Step 4: Simplify right side
    178,859x = 154,461,576,256
  5. Step 5: Solve for x
    x = 154,461,576,256/178,859
  6. Step 6: Final answer
    x = 863,594.10

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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.