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Finding the Fourth Proportional to 667.22, 920.79 and 372.49

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Solution

The fourth proportional to 667.22, 920.79 and 372.49 is: 514.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.22 : 920.79 = 372.49 : x
  2. Step 2: Convert to fraction form
    667.22/920.79 = 372.49/x
  3. Step 3: Cross multiply
    667.22x = 920.79 × 372.49
  4. Step 4: Simplify right side
    667.22x = 342,980.46
  5. Step 5: Solve for x
    x = 342,980.46/667.22
  6. Step 6: Final answer
    x = 514.04

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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.