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Finding the Fourth Proportional to 665,959.80, 998,939.70 and 192,660.60

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Solution

The fourth proportional to 665,959.80, 998,939.70 and 192,660.60 is: 288,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,959.80 : 998,939.70 = 192,660.60 : x
  2. Step 2: Convert to fraction form
    665,959.80/998,939.70 = 192,660.60/x
  3. Step 3: Cross multiply
    665,959.80x = 998,939.70 × 192,660.60
  4. Step 4: Simplify right side
    665,959.80x = 192,456,321,965.82
  5. Step 5: Solve for x
    x = 192,456,321,965.82/665,959.80
  6. Step 6: Final answer
    x = 288,990.90

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Similar ratio
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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.