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Finding the Fourth Proportional to 3,611.52, 5,414.04 and 1,421.82

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Solution

The fourth proportional to 3,611.52, 5,414.04 and 1,421.82 is: 2,131.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.52 : 5,414.04 = 1,421.82 : x
  2. Step 2: Convert to fraction form
    3,611.52/5,414.04 = 1,421.82/x
  3. Step 3: Cross multiply
    3,611.52x = 5,414.04 × 1,421.82
  4. Step 4: Simplify right side
    3,611.52x = 7,697,790.35
  5. Step 5: Solve for x
    x = 7,697,790.35/3,611.52
  6. Step 6: Final answer
    x = 2,131.45

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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.