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Finding the Fourth Proportional to 349.39, 481.09 and 275.68

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Solution

The fourth proportional to 349.39, 481.09 and 275.68 is: 379.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.39 : 481.09 = 275.68 : x
  2. Step 2: Convert to fraction form
    349.39/481.09 = 275.68/x
  3. Step 3: Cross multiply
    349.39x = 481.09 × 275.68
  4. Step 4: Simplify right side
    349.39x = 132,623.11
  5. Step 5: Solve for x
    x = 132,623.11/349.39
  6. Step 6: Final answer
    x = 379.59

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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.