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Finding the Fourth Proportional to 636,800.97, 878,564.57 and 394,996.53

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Solution

The fourth proportional to 636,800.97, 878,564.57 and 394,996.53 is: 544,958.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,800.97 : 878,564.57 = 394,996.53 : x
  2. Step 2: Convert to fraction form
    636,800.97/878,564.57 = 394,996.53/x
  3. Step 3: Cross multiply
    636,800.97x = 878,564.57 × 394,996.53
  4. Step 4: Simplify right side
    636,800.97x = 347,029,954,555.96
  5. Step 5: Solve for x
    x = 347,029,954,555.96/636,800.97
  6. Step 6: Final answer
    x = 544,958.27

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.