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Finding the Fourth Proportional to 272.78, 376.20 and 174.38

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Solution

The fourth proportional to 272.78, 376.20 and 174.38 is: 240.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.78 : 376.20 = 174.38 : x
  2. Step 2: Convert to fraction form
    272.78/376.20 = 174.38/x
  3. Step 3: Cross multiply
    272.78x = 376.20 × 174.38
  4. Step 4: Simplify right side
    272.78x = 65,601.76
  5. Step 5: Solve for x
    x = 65,601.76/272.78
  6. Step 6: Final answer
    x = 240.49

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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.