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Finding the Fourth Proportional to 272, 374.28 and 239.24

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Solution

The fourth proportional to 272, 374.28 and 239.24 is: 329.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272 : 374.28 = 239.24 : x
  2. Step 2: Convert to fraction form
    272/374.28 = 239.24/x
  3. Step 3: Cross multiply
    272x = 374.28 × 239.24
  4. Step 4: Simplify right side
    272x = 89,542.75
  5. Step 5: Solve for x
    x = 89,542.75/272
  6. Step 6: Final answer
    x = 329.20

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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.