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Finding the Fourth Proportional to 394,486.19, 591,354.75 and 128,060.37

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Solution

The fourth proportional to 394,486.19, 591,354.75 and 128,060.37 is: 191,968.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,486.19 : 591,354.75 = 128,060.37 : x
  2. Step 2: Convert to fraction form
    394,486.19/591,354.75 = 128,060.37/x
  3. Step 3: Cross multiply
    394,486.19x = 591,354.75 × 128,060.37
  4. Step 4: Simplify right side
    394,486.19x = 75,729,108,086.26
  5. Step 5: Solve for x
    x = 75,729,108,086.26/394,486.19
  6. Step 6: Final answer
    x = 191,968.97

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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.