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Finding the Fourth Proportional to 3,811.87, 5,718.03 and 1,471.89

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Solution

The fourth proportional to 3,811.87, 5,718.03 and 1,471.89 is: 2,207.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.87 : 5,718.03 = 1,471.89 : x
  2. Step 2: Convert to fraction form
    3,811.87/5,718.03 = 1,471.89/x
  3. Step 3: Cross multiply
    3,811.87x = 5,718.03 × 1,471.89
  4. Step 4: Simplify right side
    3,811.87x = 8,416,311.18
  5. Step 5: Solve for x
    x = 8,416,311.18/3,811.87
  6. Step 6: Final answer
    x = 2,207.92

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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.