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Finding the Fourth Proportional to 638,315.20, 957,472.80 and 189,105.40

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Solution

The fourth proportional to 638,315.20, 957,472.80 and 189,105.40 is: 283,658.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,315.20 : 957,472.80 = 189,105.40 : x
  2. Step 2: Convert to fraction form
    638,315.20/957,472.80 = 189,105.40/x
  3. Step 3: Cross multiply
    638,315.20x = 957,472.80 × 189,105.40
  4. Step 4: Simplify right side
    638,315.20x = 181,063,276,833.12
  5. Step 5: Solve for x
    x = 181,063,276,833.12/638,315.20
  6. Step 6: Final answer
    x = 283,658.10

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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.