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Finding the Fourth Proportional to 681,135.68, 939,896.53 and 419,449.39

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Solution

The fourth proportional to 681,135.68, 939,896.53 and 419,449.39 is: 578,796.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,135.68 : 939,896.53 = 419,449.39 : x
  2. Step 2: Convert to fraction form
    681,135.68/939,896.53 = 419,449.39/x
  3. Step 3: Cross multiply
    681,135.68x = 939,896.53 × 419,449.39
  4. Step 4: Simplify right side
    681,135.68x = 394,239,022,773.25
  5. Step 5: Solve for x
    x = 394,239,022,773.25/681,135.68
  6. Step 6: Final answer
    x = 578,796.61

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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.