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Finding the Fourth Proportional to 3,818.64, 5,729.04 and 1,222.32

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Solution

The fourth proportional to 3,818.64, 5,729.04 and 1,222.32 is: 1,833.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,818.64 : 5,729.04 = 1,222.32 : x
  2. Step 2: Convert to fraction form
    3,818.64/5,729.04 = 1,222.32/x
  3. Step 3: Cross multiply
    3,818.64x = 5,729.04 × 1,222.32
  4. Step 4: Simplify right side
    3,818.64x = 7,002,720.17
  5. Step 5: Solve for x
    x = 7,002,720.17/3,818.64
  6. Step 6: Final answer
    x = 1,833.83

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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.