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Finding the Fourth Proportional to 618,145.65, 927,218.48 and 378,997.20

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Solution

The fourth proportional to 618,145.65, 927,218.48 and 378,997.20 is: 568,495.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,145.65 : 927,218.48 = 378,997.20 : x
  2. Step 2: Convert to fraction form
    618,145.65/927,218.48 = 378,997.20/x
  3. Step 3: Cross multiply
    618,145.65x = 927,218.48 × 378,997.20
  4. Step 4: Simplify right side
    618,145.65x = 351,413,205,813.27
  5. Step 5: Solve for x
    x = 351,413,205,813.27/618,145.65
  6. Step 6: Final answer
    x = 568,495.80

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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.