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Finding the Fourth Proportional to 641.01, 884.78 and 379.11

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Solution

The fourth proportional to 641.01, 884.78 and 379.11 is: 523.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.01 : 884.78 = 379.11 : x
  2. Step 2: Convert to fraction form
    641.01/884.78 = 379.11/x
  3. Step 3: Cross multiply
    641.01x = 884.78 × 379.11
  4. Step 4: Simplify right side
    641.01x = 335,427.05
  5. Step 5: Solve for x
    x = 335,427.05/641.01
  6. Step 6: Final answer
    x = 523.28

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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.