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Finding the Fourth Proportional to 611.48, 843.92 and 349.55

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Solution

The fourth proportional to 611.48, 843.92 and 349.55 is: 482.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.48 : 843.92 = 349.55 : x
  2. Step 2: Convert to fraction form
    611.48/843.92 = 349.55/x
  3. Step 3: Cross multiply
    611.48x = 843.92 × 349.55
  4. Step 4: Simplify right side
    611.48x = 294,990.74
  5. Step 5: Solve for x
    x = 294,990.74/611.48
  6. Step 6: Final answer
    x = 482.42

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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.