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Finding the Fourth Proportional to 3,639.81, 5,022.93 and 1,983.81

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Solution

The fourth proportional to 3,639.81, 5,022.93 and 1,983.81 is: 2,737.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.81 : 5,022.93 = 1,983.81 : x
  2. Step 2: Convert to fraction form
    3,639.81/5,022.93 = 1,983.81/x
  3. Step 3: Cross multiply
    3,639.81x = 5,022.93 × 1,983.81
  4. Step 4: Simplify right side
    3,639.81x = 9,964,513.65
  5. Step 5: Solve for x
    x = 9,964,513.65/3,639.81
  6. Step 6: Final answer
    x = 2,737.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.