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Finding the Fourth Proportional to 667.62, 921.38 and 372.92

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Solution

The fourth proportional to 667.62, 921.38 and 372.92 is: 514.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.62 : 921.38 = 372.92 : x
  2. Step 2: Convert to fraction form
    667.62/921.38 = 372.92/x
  3. Step 3: Cross multiply
    667.62x = 921.38 × 372.92
  4. Step 4: Simplify right side
    667.62x = 343,594.56
  5. Step 5: Solve for x
    x = 343,594.56/667.62
  6. Step 6: Final answer
    x = 514.66

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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.