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Finding the Fourth Proportional to 274.73, 379.11 and 155.09

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Solution

The fourth proportional to 274.73, 379.11 and 155.09 is: 214.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.73 : 379.11 = 155.09 : x
  2. Step 2: Convert to fraction form
    274.73/379.11 = 155.09/x
  3. Step 3: Cross multiply
    274.73x = 379.11 × 155.09
  4. Step 4: Simplify right side
    274.73x = 58,796.17
  5. Step 5: Solve for x
    x = 58,796.17/274.73
  6. Step 6: Final answer
    x = 214.01

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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.