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Finding the Fourth Proportional to 612,879.70, 919,319.55 and 192,188.38

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Solution

The fourth proportional to 612,879.70, 919,319.55 and 192,188.38 is: 288,282.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,879.70 : 919,319.55 = 192,188.38 : x
  2. Step 2: Convert to fraction form
    612,879.70/919,319.55 = 192,188.38/x
  3. Step 3: Cross multiply
    612,879.70x = 919,319.55 × 192,188.38
  4. Step 4: Simplify right side
    612,879.70x = 176,682,529,459.29
  5. Step 5: Solve for x
    x = 176,682,529,459.29/612,879.70
  6. Step 6: Final answer
    x = 288,282.56

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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.