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Finding the Fourth Proportional to 2,716.81, 4,074.66 and 769.03

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Solution

The fourth proportional to 2,716.81, 4,074.66 and 769.03 is: 1,153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,716.81 : 4,074.66 = 769.03 : x
  2. Step 2: Convert to fraction form
    2,716.81/4,074.66 = 769.03/x
  3. Step 3: Cross multiply
    2,716.81x = 4,074.66 × 769.03
  4. Step 4: Simplify right side
    2,716.81x = 3,133,535.78
  5. Step 5: Solve for x
    x = 3,133,535.78/2,716.81
  6. Step 6: Final answer
    x = 1,153.39

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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.