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Finding the Third Proportional to 166,976 and 258,243

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Solution

The third proportional to 166,976 and 258,243 is: 399,395.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,976 : 258,243 = 258,243 : x
  2. Step 2: Convert to fraction form
    166,976/258,243 = 258,243/x
  3. Step 3: Cross multiply
    166,976x = 258,243 × 258,243
  4. Step 4: Simplify right side
    166,976x = 66,689,447,049
  5. Step 5: Solve for x
    x = 66,689,447,049/166,976
  6. Step 6: Final answer
    x = 399,395.40

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.