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Finding the Fourth Proportional to 685,194.75, 945,351.37 and 398,659.48

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Solution

The fourth proportional to 685,194.75, 945,351.37 and 398,659.48 is: 550,023.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,194.75 : 945,351.37 = 398,659.48 : x
  2. Step 2: Convert to fraction form
    685,194.75/945,351.37 = 398,659.48/x
  3. Step 3: Cross multiply
    685,194.75x = 945,351.37 × 398,659.48
  4. Step 4: Simplify right side
    685,194.75x = 376,873,282,691.39
  5. Step 5: Solve for x
    x = 376,873,282,691.39/685,194.75
  6. Step 6: Final answer
    x = 550,023.60

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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.