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Finding the Fourth Proportional to 3,474.65, 5,213.16 and 1,912.66

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Solution

The fourth proportional to 3,474.65, 5,213.16 and 1,912.66 is: 2,869.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,474.65 : 5,213.16 = 1,912.66 : x
  2. Step 2: Convert to fraction form
    3,474.65/5,213.16 = 1,912.66/x
  3. Step 3: Cross multiply
    3,474.65x = 5,213.16 × 1,912.66
  4. Step 4: Simplify right side
    3,474.65x = 9,971,018.90
  5. Step 5: Solve for x
    x = 9,971,018.90/3,474.65
  6. Step 6: Final answer
    x = 2,869.65

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.