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Finding the Fourth Proportional to 275.52, 379.38 and 238.68

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Solution

The fourth proportional to 275.52, 379.38 and 238.68 is: 328.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.52 : 379.38 = 238.68 : x
  2. Step 2: Convert to fraction form
    275.52/379.38 = 238.68/x
  3. Step 3: Cross multiply
    275.52x = 379.38 × 238.68
  4. Step 4: Simplify right side
    275.52x = 90,550.42
  5. Step 5: Solve for x
    x = 90,550.42/275.52
  6. Step 6: Final answer
    x = 328.65

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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.