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Finding the Fourth Proportional to 667.52, 921.19 and 372.86

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Solution

The fourth proportional to 667.52, 921.19 and 372.86 is: 514.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.52 : 921.19 = 372.86 : x
  2. Step 2: Convert to fraction form
    667.52/921.19 = 372.86/x
  3. Step 3: Cross multiply
    667.52x = 921.19 × 372.86
  4. Step 4: Simplify right side
    667.52x = 343,469.37
  5. Step 5: Solve for x
    x = 343,469.37/667.52
  6. Step 6: Final answer
    x = 514.54

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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.