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Finding the Fourth Proportional to 613,961.97, 921,067.51 and 193,139.97

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Solution

The fourth proportional to 613,961.97, 921,067.51 and 193,139.97 is: 289,749.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,961.97 : 921,067.51 = 193,139.97 : x
  2. Step 2: Convert to fraction form
    613,961.97/921,067.51 = 193,139.97/x
  3. Step 3: Cross multiply
    613,961.97x = 921,067.51 × 193,139.97
  4. Step 4: Simplify right side
    613,961.97x = 177,894,951,249.38
  5. Step 5: Solve for x
    x = 177,894,951,249.38/613,961.97
  6. Step 6: Final answer
    x = 289,749.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.