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Finding the Fourth Proportional to 641.28, 960.87 and 250.84

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Solution

The fourth proportional to 641.28, 960.87 and 250.84 is: 375.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.28 : 960.87 = 250.84 : x
  2. Step 2: Convert to fraction form
    641.28/960.87 = 250.84/x
  3. Step 3: Cross multiply
    641.28x = 960.87 × 250.84
  4. Step 4: Simplify right side
    641.28x = 241,022.23
  5. Step 5: Solve for x
    x = 241,022.23/641.28
  6. Step 6: Final answer
    x = 375.85

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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.