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Finding the Fourth Proportional to 3,816.99, 5,729.13 and 1,969.38

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Solution

The fourth proportional to 3,816.99, 5,729.13 and 1,969.38 is: 2,955.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,816.99 : 5,729.13 = 1,969.38 : x
  2. Step 2: Convert to fraction form
    3,816.99/5,729.13 = 1,969.38/x
  3. Step 3: Cross multiply
    3,816.99x = 5,729.13 × 1,969.38
  4. Step 4: Simplify right side
    3,816.99x = 11,282,834.04
  5. Step 5: Solve for x
    x = 11,282,834.04/3,816.99
  6. Step 6: Final answer
    x = 2,955.95

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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.