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Finding the Fourth Proportional to 3,838.49, 5,757.89 and 1,645.72

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Solution

The fourth proportional to 3,838.49, 5,757.89 and 1,645.72 is: 2,468.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,838.49 : 5,757.89 = 1,645.72 : x
  2. Step 2: Convert to fraction form
    3,838.49/5,757.89 = 1,645.72/x
  3. Step 3: Cross multiply
    3,838.49x = 5,757.89 × 1,645.72
  4. Step 4: Simplify right side
    3,838.49x = 9,475,852.11
  5. Step 5: Solve for x
    x = 9,475,852.11/3,838.49
  6. Step 6: Final answer
    x = 2,468.64

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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.