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Finding the Fourth Proportional to 3,169.88, 4,372.04 and 2,811.38

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Solution

The fourth proportional to 3,169.88, 4,372.04 and 2,811.38 is: 3,877.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,169.88 : 4,372.04 = 2,811.38 : x
  2. Step 2: Convert to fraction form
    3,169.88/4,372.04 = 2,811.38/x
  3. Step 3: Cross multiply
    3,169.88x = 4,372.04 × 2,811.38
  4. Step 4: Simplify right side
    3,169.88x = 12,291,465.82
  5. Step 5: Solve for x
    x = 12,291,465.82/3,169.88
  6. Step 6: Final answer
    x = 3,877.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.