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Finding the Fourth Proportional to 3,811.98, 5,716.80 and 1,471.80

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Solution

The fourth proportional to 3,811.98, 5,716.80 and 1,471.80 is: 2,207.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.98 : 5,716.80 = 1,471.80 : x
  2. Step 2: Convert to fraction form
    3,811.98/5,716.80 = 1,471.80/x
  3. Step 3: Cross multiply
    3,811.98x = 5,716.80 × 1,471.80
  4. Step 4: Simplify right side
    3,811.98x = 8,413,986.24
  5. Step 5: Solve for x
    x = 8,413,986.24/3,811.98
  6. Step 6: Final answer
    x = 2,207.25

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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.