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Finding the Fourth Proportional to 311,393.72, 429,755.07 and 190,614.81

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Solution

The fourth proportional to 311,393.72, 429,755.07 and 190,614.81 is: 263,067.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,393.72 : 429,755.07 = 190,614.81 : x
  2. Step 2: Convert to fraction form
    311,393.72/429,755.07 = 190,614.81/x
  3. Step 3: Cross multiply
    311,393.72x = 429,755.07 × 190,614.81
  4. Step 4: Simplify right side
    311,393.72x = 81,917,681,014.59
  5. Step 5: Solve for x
    x = 81,917,681,014.59/311,393.72
  6. Step 6: Final answer
    x = 263,067.87

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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.