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Finding the Fourth Proportional to 3,168.69, 4,372.82 and 1,909.81

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Solution

The fourth proportional to 3,168.69, 4,372.82 and 1,909.81 is: 2,635.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.69 : 4,372.82 = 1,909.81 : x
  2. Step 2: Convert to fraction form
    3,168.69/4,372.82 = 1,909.81/x
  3. Step 3: Cross multiply
    3,168.69x = 4,372.82 × 1,909.81
  4. Step 4: Simplify right side
    3,168.69x = 8,351,255.36
  5. Step 5: Solve for x
    x = 8,351,255.36/3,168.69
  6. Step 6: Final answer
    x = 2,635.55

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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.