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Finding the Fourth Proportional to 1,644.44, 2,467.31 and 987.55

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Solution

The fourth proportional to 1,644.44, 2,467.31 and 987.55 is: 1,481.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644.44 : 2,467.31 = 987.55 : x
  2. Step 2: Convert to fraction form
    1,644.44/2,467.31 = 987.55/x
  3. Step 3: Cross multiply
    1,644.44x = 2,467.31 × 987.55
  4. Step 4: Simplify right side
    1,644.44x = 2,436,580.88
  5. Step 5: Solve for x
    x = 2,436,580.88/1,644.44
  6. Step 6: Final answer
    x = 1,481.71

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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.