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Finding the Fourth Proportional to 667.28, 920.82 and 372.54

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Solution

The fourth proportional to 667.28, 920.82 and 372.54 is: 514.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.28 : 920.82 = 372.54 : x
  2. Step 2: Convert to fraction form
    667.28/920.82 = 372.54/x
  3. Step 3: Cross multiply
    667.28x = 920.82 × 372.54
  4. Step 4: Simplify right side
    667.28x = 343,042.28
  5. Step 5: Solve for x
    x = 343,042.28/667.28
  6. Step 6: Final answer
    x = 514.09

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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.