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Finding the Fourth Proportional to 638,904.70, 958,357.05 and 189,694.90

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Solution

The fourth proportional to 638,904.70, 958,357.05 and 189,694.90 is: 284,542.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,904.70 : 958,357.05 = 189,694.90 : x
  2. Step 2: Convert to fraction form
    638,904.70/958,357.05 = 189,694.90/x
  3. Step 3: Cross multiply
    638,904.70x = 958,357.05 × 189,694.90
  4. Step 4: Simplify right side
    638,904.70x = 181,795,444,764.05
  5. Step 5: Solve for x
    x = 181,795,444,764.05/638,904.70
  6. Step 6: Final answer
    x = 284,542.35

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Half scale
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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.