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Finding the Fourth Proportional to 274.59, 378.85 and 171.09

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Solution

The fourth proportional to 274.59, 378.85 and 171.09 is: 236.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.59 : 378.85 = 171.09 : x
  2. Step 2: Convert to fraction form
    274.59/378.85 = 171.09/x
  3. Step 3: Cross multiply
    274.59x = 378.85 × 171.09
  4. Step 4: Simplify right side
    274.59x = 64,817.45
  5. Step 5: Solve for x
    x = 64,817.45/274.59
  6. Step 6: Final answer
    x = 236.05

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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.