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Finding the Fourth Proportional to 3,453.62, 5,180.49 and 856.55

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Solution

The fourth proportional to 3,453.62, 5,180.49 and 856.55 is: 1,284.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,453.62 : 5,180.49 = 856.55 : x
  2. Step 2: Convert to fraction form
    3,453.62/5,180.49 = 856.55/x
  3. Step 3: Cross multiply
    3,453.62x = 5,180.49 × 856.55
  4. Step 4: Simplify right side
    3,453.62x = 4,437,361.66
  5. Step 5: Solve for x
    x = 4,437,361.66/3,453.62
  6. Step 6: Final answer
    x = 1,284.85

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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.