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Finding the Fourth Proportional to 412,958.75, 619,019.84 and 279,852.45

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Solution

The fourth proportional to 412,958.75, 619,019.84 and 279,852.45 is: 419,495.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,958.75 : 619,019.84 = 279,852.45 : x
  2. Step 2: Convert to fraction form
    412,958.75/619,019.84 = 279,852.45/x
  3. Step 3: Cross multiply
    412,958.75x = 619,019.84 × 279,852.45
  4. Step 4: Simplify right side
    412,958.75x = 173,234,217,423.35
  5. Step 5: Solve for x
    x = 173,234,217,423.35/412,958.75
  6. Step 6: Final answer
    x = 419,495.21

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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.