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Finding the Fourth Proportional to 318,391.97, 439,380.86 and 191,067.66

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Solution

The fourth proportional to 318,391.97, 439,380.86 and 191,067.66 is: 263,673.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,391.97 : 439,380.86 = 191,067.66 : x
  2. Step 2: Convert to fraction form
    318,391.97/439,380.86 = 191,067.66/x
  3. Step 3: Cross multiply
    318,391.97x = 439,380.86 × 191,067.66
  4. Step 4: Simplify right side
    318,391.97x = 83,951,471,813.65
  5. Step 5: Solve for x
    x = 83,951,471,813.65/318,391.97
  6. Step 6: Final answer
    x = 263,673.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.