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Finding the Fourth Proportional to 3,763.72, 5,639.84 and 1,912.06

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Solution

The fourth proportional to 3,763.72, 5,639.84 and 1,912.06 is: 2,865.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,763.72 : 5,639.84 = 1,912.06 : x
  2. Step 2: Convert to fraction form
    3,763.72/5,639.84 = 1,912.06/x
  3. Step 3: Cross multiply
    3,763.72x = 5,639.84 × 1,912.06
  4. Step 4: Simplify right side
    3,763.72x = 10,783,674.71
  5. Step 5: Solve for x
    x = 10,783,674.71/3,763.72
  6. Step 6: Final answer
    x = 2,865.17

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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.