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Finding the Fourth Proportional to 627,807.60, 941,711.40 and 415,231.20

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Solution

The fourth proportional to 627,807.60, 941,711.40 and 415,231.20 is: 622,846.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,807.60 : 941,711.40 = 415,231.20 : x
  2. Step 2: Convert to fraction form
    627,807.60/941,711.40 = 415,231.20/x
  3. Step 3: Cross multiply
    627,807.60x = 941,711.40 × 415,231.20
  4. Step 4: Simplify right side
    627,807.60x = 391,027,954,675.68
  5. Step 5: Solve for x
    x = 391,027,954,675.68/627,807.60
  6. Step 6: Final answer
    x = 622,846.80

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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.