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Finding the Fourth Proportional to 611.65, 843.91 and 349.66

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Solution

The fourth proportional to 611.65, 843.91 and 349.66 is: 482.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.65 : 843.91 = 349.66 : x
  2. Step 2: Convert to fraction form
    611.65/843.91 = 349.66/x
  3. Step 3: Cross multiply
    611.65x = 843.91 × 349.66
  4. Step 4: Simplify right side
    611.65x = 295,081.57
  5. Step 5: Solve for x
    x = 295,081.57/611.65
  6. Step 6: Final answer
    x = 482.44

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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.