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Finding the Fourth Proportional to 3,447.88, 5,171.81 and 1,139.38

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Solution

The fourth proportional to 3,447.88, 5,171.81 and 1,139.38 is: 1,709.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,447.88 : 5,171.81 = 1,139.38 : x
  2. Step 2: Convert to fraction form
    3,447.88/5,171.81 = 1,139.38/x
  3. Step 3: Cross multiply
    3,447.88x = 5,171.81 × 1,139.38
  4. Step 4: Simplify right side
    3,447.88x = 5,892,656.88
  5. Step 5: Solve for x
    x = 5,892,656.88/3,447.88
  6. Step 6: Final answer
    x = 1,709.07

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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.