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Finding the Fourth Proportional to 611.12, 843.40 and 349.18

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Solution

The fourth proportional to 611.12, 843.40 and 349.18 is: 481.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.12 : 843.40 = 349.18 : x
  2. Step 2: Convert to fraction form
    611.12/843.40 = 349.18/x
  3. Step 3: Cross multiply
    611.12x = 843.40 × 349.18
  4. Step 4: Simplify right side
    611.12x = 294,498.41
  5. Step 5: Solve for x
    x = 294,498.41/611.12
  6. Step 6: Final answer
    x = 481.90

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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.