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Finding the Fourth Proportional to 638,123.40, 957,012.30 and 188,843.40

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Solution

The fourth proportional to 638,123.40, 957,012.30 and 188,843.40 is: 283,213.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,123.40 : 957,012.30 = 188,843.40 : x
  2. Step 2: Convert to fraction form
    638,123.40/957,012.30 = 188,843.40/x
  3. Step 3: Cross multiply
    638,123.40x = 957,012.30 × 188,843.40
  4. Step 4: Simplify right side
    638,123.40x = 180,725,456,573.82
  5. Step 5: Solve for x
    x = 180,725,456,573.82/638,123.40
  6. Step 6: Final answer
    x = 283,213.96

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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.