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Finding the Fourth Proportional to 667.02, 920.48 and 372.31

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Solution

The fourth proportional to 667.02, 920.48 and 372.31 is: 513.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.02 : 920.48 = 372.31 : x
  2. Step 2: Convert to fraction form
    667.02/920.48 = 372.31/x
  3. Step 3: Cross multiply
    667.02x = 920.48 × 372.31
  4. Step 4: Simplify right side
    667.02x = 342,703.91
  5. Step 5: Solve for x
    x = 342,703.91/667.02
  6. Step 6: Final answer
    x = 513.78

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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.