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Finding the Fourth Proportional to 611.11, 843.40 and 349.17

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Solution

The fourth proportional to 611.11, 843.40 and 349.17 is: 481.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.11 : 843.40 = 349.17 : x
  2. Step 2: Convert to fraction form
    611.11/843.40 = 349.17/x
  3. Step 3: Cross multiply
    611.11x = 843.40 × 349.17
  4. Step 4: Simplify right side
    611.11x = 294,489.98
  5. Step 5: Solve for x
    x = 294,489.98/611.11
  6. Step 6: Final answer
    x = 481.89

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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.