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Finding the Fourth Proportional to 643,936.80, 966,250.80 and 269,997.60

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Solution

The fourth proportional to 643,936.80, 966,250.80 and 269,997.60 is: 405,141.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,936.80 : 966,250.80 = 269,997.60 : x
  2. Step 2: Convert to fraction form
    643,936.80/966,250.80 = 269,997.60/x
  3. Step 3: Cross multiply
    643,936.80x = 966,250.80 × 269,997.60
  4. Step 4: Simplify right side
    643,936.80x = 260,885,396,998.08
  5. Step 5: Solve for x
    x = 260,885,396,998.08/643,936.80
  6. Step 6: Final answer
    x = 405,141.31

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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.