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Finding the Fourth Proportional to 3,805.50, 5,252.31 and 2,149.50

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Solution

The fourth proportional to 3,805.50, 5,252.31 and 2,149.50 is: 2,966.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,805.50 : 5,252.31 = 2,149.50 : x
  2. Step 2: Convert to fraction form
    3,805.50/5,252.31 = 2,149.50/x
  3. Step 3: Cross multiply
    3,805.50x = 5,252.31 × 2,149.50
  4. Step 4: Simplify right side
    3,805.50x = 11,289,840.35
  5. Step 5: Solve for x
    x = 11,289,840.35/3,805.50
  6. Step 6: Final answer
    x = 2,966.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.