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Finding the Fourth Proportional to 638,314.20, 957,471.30 and 189,104.40

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Solution

The fourth proportional to 638,314.20, 957,471.30 and 189,104.40 is: 283,656.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,314.20 : 957,471.30 = 189,104.40 : x
  2. Step 2: Convert to fraction form
    638,314.20/957,471.30 = 189,104.40/x
  3. Step 3: Cross multiply
    638,314.20x = 957,471.30 × 189,104.40
  4. Step 4: Simplify right side
    638,314.20x = 181,062,035,703.72
  5. Step 5: Solve for x
    x = 181,062,035,703.72/638,314.20
  6. Step 6: Final answer
    x = 283,656.60

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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.