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Finding the Third Proportional to 139,172 and 310,218

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Solution

The third proportional to 139,172 and 310,218 is: 691,483.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,172 : 310,218 = 310,218 : x
  2. Step 2: Convert to fraction form
    139,172/310,218 = 310,218/x
  3. Step 3: Cross multiply
    139,172x = 310,218 × 310,218
  4. Step 4: Simplify right side
    139,172x = 96,235,207,524
  5. Step 5: Solve for x
    x = 96,235,207,524/139,172
  6. Step 6: Final answer
    x = 691,483.97

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.