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Finding the Fourth Proportional to 665,295.80, 997,943.70 and 191,996.60

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Solution

The fourth proportional to 665,295.80, 997,943.70 and 191,996.60 is: 287,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,295.80 : 997,943.70 = 191,996.60 : x
  2. Step 2: Convert to fraction form
    665,295.80/997,943.70 = 191,996.60/x
  3. Step 3: Cross multiply
    665,295.80x = 997,943.70 × 191,996.60
  4. Step 4: Simplify right side
    665,295.80x = 191,601,797,391.42
  5. Step 5: Solve for x
    x = 191,601,797,391.42/665,295.80
  6. Step 6: Final answer
    x = 287,994.90

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Double scale
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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.