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Finding the Fourth Proportional to 657,019.70, 984,982.80 and 278,231.30

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Solution

The fourth proportional to 657,019.70, 984,982.80 and 278,231.30 is: 417,115.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,019.70 : 984,982.80 = 278,231.30 : x
  2. Step 2: Convert to fraction form
    657,019.70/984,982.80 = 278,231.30/x
  3. Step 3: Cross multiply
    657,019.70x = 984,982.80 × 278,231.30
  4. Step 4: Simplify right side
    657,019.70x = 274,053,044,921.64
  5. Step 5: Solve for x
    x = 274,053,044,921.64/657,019.70
  6. Step 6: Final answer
    x = 417,115.42

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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.