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Finding the Fourth Proportional to 250.73, 376.09 and 128.91

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Solution

The fourth proportional to 250.73, 376.09 and 128.91 is: 193.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.73 : 376.09 = 128.91 : x
  2. Step 2: Convert to fraction form
    250.73/376.09 = 128.91/x
  3. Step 3: Cross multiply
    250.73x = 376.09 × 128.91
  4. Step 4: Simplify right side
    250.73x = 48,481.44
  5. Step 5: Solve for x
    x = 48,481.44/250.73
  6. Step 6: Final answer
    x = 193.37

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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.