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Finding the Fourth Proportional to 3,639.78, 5,455.89 and 2,469.89

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Solution

The fourth proportional to 3,639.78, 5,455.89 and 2,469.89 is: 3,702.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.78 : 5,455.89 = 2,469.89 : x
  2. Step 2: Convert to fraction form
    3,639.78/5,455.89 = 2,469.89/x
  3. Step 3: Cross multiply
    3,639.78x = 5,455.89 × 2,469.89
  4. Step 4: Simplify right side
    3,639.78x = 13,475,441.98
  5. Step 5: Solve for x
    x = 13,475,441.98/3,639.78
  6. Step 6: Final answer
    x = 3,702.27

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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.