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Finding the Fourth Proportional to 638,297.70, 957,446.55 and 189,087.90

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Solution

The fourth proportional to 638,297.70, 957,446.55 and 189,087.90 is: 283,631.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,297.70 : 957,446.55 = 189,087.90 : x
  2. Step 2: Convert to fraction form
    638,297.70/957,446.55 = 189,087.90/x
  3. Step 3: Cross multiply
    638,297.70x = 957,446.55 × 189,087.90
  4. Step 4: Simplify right side
    638,297.70x = 181,041,557,501.75
  5. Step 5: Solve for x
    x = 181,041,557,501.75/638,297.70
  6. Step 6: Final answer
    x = 283,631.85

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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.