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Finding the Third Proportional to 178,734 and 392,889

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Solution

The third proportional to 178,734 and 392,889 is: 863,639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,734 : 392,889 = 392,889 : x
  2. Step 2: Convert to fraction form
    178,734/392,889 = 392,889/x
  3. Step 3: Cross multiply
    178,734x = 392,889 × 392,889
  4. Step 4: Simplify right side
    178,734x = 154,361,766,321
  5. Step 5: Solve for x
    x = 154,361,766,321/178,734
  6. Step 6: Final answer
    x = 863,639.63

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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.