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Finding the Fourth Proportional to 275.21, 379.92 and 192.39

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Solution

The fourth proportional to 275.21, 379.92 and 192.39 is: 265.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.21 : 379.92 = 192.39 : x
  2. Step 2: Convert to fraction form
    275.21/379.92 = 192.39/x
  3. Step 3: Cross multiply
    275.21x = 379.92 × 192.39
  4. Step 4: Simplify right side
    275.21x = 73,092.81
  5. Step 5: Solve for x
    x = 73,092.81/275.21
  6. Step 6: Final answer
    x = 265.59

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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.