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Finding the Fourth Proportional to 3,809.54, 5,713.08 and 1,211.87

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Solution

The fourth proportional to 3,809.54, 5,713.08 and 1,211.87 is: 1,817.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,809.54 : 5,713.08 = 1,211.87 : x
  2. Step 2: Convert to fraction form
    3,809.54/5,713.08 = 1,211.87/x
  3. Step 3: Cross multiply
    3,809.54x = 5,713.08 × 1,211.87
  4. Step 4: Simplify right side
    3,809.54x = 6,923,510.26
  5. Step 5: Solve for x
    x = 6,923,510.26/3,809.54
  6. Step 6: Final answer
    x = 1,817.41

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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.