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Finding the Fourth Proportional to 667.57, 921.28 and 372.83

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Solution

The fourth proportional to 667.57, 921.28 and 372.83 is: 514.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.57 : 921.28 = 372.83 : x
  2. Step 2: Convert to fraction form
    667.57/921.28 = 372.83/x
  3. Step 3: Cross multiply
    667.57x = 921.28 × 372.83
  4. Step 4: Simplify right side
    667.57x = 343,480.82
  5. Step 5: Solve for x
    x = 343,480.82/667.57
  6. Step 6: Final answer
    x = 514.53

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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.