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Finding the Fourth Proportional to 3,858.64, 5,778.73 and 3,664.88

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Solution

The fourth proportional to 3,858.64, 5,778.73 and 3,664.88 is: 5,488.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.64 : 5,778.73 = 3,664.88 : x
  2. Step 2: Convert to fraction form
    3,858.64/5,778.73 = 3,664.88/x
  3. Step 3: Cross multiply
    3,858.64x = 5,778.73 × 3,664.88
  4. Step 4: Simplify right side
    3,858.64x = 21,178,352.00
  5. Step 5: Solve for x
    x = 21,178,352.00/3,858.64
  6. Step 6: Final answer
    x = 5,488.55

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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.