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Finding the Fourth Proportional to 638,230.78, 957,356.09 and 188,997.08

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Solution

The fourth proportional to 638,230.78, 957,356.09 and 188,997.08 is: 283,498.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,230.78 : 957,356.09 = 188,997.08 : x
  2. Step 2: Convert to fraction form
    638,230.78/957,356.09 = 188,997.08/x
  3. Step 3: Cross multiply
    638,230.78x = 957,356.09 × 188,997.08
  4. Step 4: Simplify right side
    638,230.78x = 180,937,505,530.22
  5. Step 5: Solve for x
    x = 180,937,505,530.22/638,230.78
  6. Step 6: Final answer
    x = 283,498.56

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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.