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Finding the Fourth Proportional to 266.73, 399.42 and 193.31

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Solution

The fourth proportional to 266.73, 399.42 and 193.31 is: 289.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.73 : 399.42 = 193.31 : x
  2. Step 2: Convert to fraction form
    266.73/399.42 = 193.31/x
  3. Step 3: Cross multiply
    266.73x = 399.42 × 193.31
  4. Step 4: Simplify right side
    266.73x = 77,211.88
  5. Step 5: Solve for x
    x = 77,211.88/266.73
  6. Step 6: Final answer
    x = 289.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.