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Finding the Fourth Proportional to 275,930.70, 412,911.90 and 191,293.80

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Solution

The fourth proportional to 275,930.70, 412,911.90 and 191,293.80 is: 286,258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,930.70 : 412,911.90 = 191,293.80 : x
  2. Step 2: Convert to fraction form
    275,930.70/412,911.90 = 191,293.80/x
  3. Step 3: Cross multiply
    275,930.70x = 412,911.90 × 191,293.80
  4. Step 4: Simplify right side
    275,930.70x = 78,987,486,416.22
  5. Step 5: Solve for x
    x = 78,987,486,416.22/275,930.70
  6. Step 6: Final answer
    x = 286,258.42

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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.