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Finding the Fourth Proportional to 3,168.55, 4,372.86 and 1,909.99

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Solution

The fourth proportional to 3,168.55, 4,372.86 and 1,909.99 is: 2,635.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.55 : 4,372.86 = 1,909.99 : x
  2. Step 2: Convert to fraction form
    3,168.55/4,372.86 = 1,909.99/x
  3. Step 3: Cross multiply
    3,168.55x = 4,372.86 × 1,909.99
  4. Step 4: Simplify right side
    3,168.55x = 8,352,118.87
  5. Step 5: Solve for x
    x = 8,352,118.87/3,168.55
  6. Step 6: Final answer
    x = 2,635.94

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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.