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Finding the Fourth Proportional to 1,282,436, 1,769,843.60 and 717,188

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Solution

The fourth proportional to 1,282,436, 1,769,843.60 and 717,188 is: 989,765.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282,436 : 1,769,843.60 = 717,188 : x
  2. Step 2: Convert to fraction form
    1,282,436/1,769,843.60 = 717,188/x
  3. Step 3: Cross multiply
    1,282,436x = 1,769,843.60 × 717,188
  4. Step 4: Simplify right side
    1,282,436x = 1,269,310,591,796.80
  5. Step 5: Solve for x
    x = 1,269,310,591,796.80/1,282,436
  6. Step 6: Final answer
    x = 989,765.25

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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.