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Finding the Third Proportional to 197,145 and 278,955.75

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Solution

The third proportional to 197,145 and 278,955.75 is: 394,716.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,145 : 278,955.75 = 278,955.75 : x
  2. Step 2: Convert to fraction form
    197,145/278,955.75 = 278,955.75/x
  3. Step 3: Cross multiply
    197,145x = 278,955.75 × 278,955.75
  4. Step 4: Simplify right side
    197,145x = 77,816,310,458.06
  5. Step 5: Solve for x
    x = 77,816,310,458.06/197,145
  6. Step 6: Final answer
    x = 394,716.12

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.