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Finding the Fourth Proportional to 667.55, 925.26 and 629.11

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Solution

The fourth proportional to 667.55, 925.26 and 629.11 is: 871.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.55 : 925.26 = 629.11 : x
  2. Step 2: Convert to fraction form
    667.55/925.26 = 629.11/x
  3. Step 3: Cross multiply
    667.55x = 925.26 × 629.11
  4. Step 4: Simplify right side
    667.55x = 582,082.55
  5. Step 5: Solve for x
    x = 582,082.55/667.55
  6. Step 6: Final answer
    x = 871.97

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.