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Finding the Fourth Proportional to 274.17, 411.51 and 171.15

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Solution

The fourth proportional to 274.17, 411.51 and 171.15 is: 256.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.17 : 411.51 = 171.15 : x
  2. Step 2: Convert to fraction form
    274.17/411.51 = 171.15/x
  3. Step 3: Cross multiply
    274.17x = 411.51 × 171.15
  4. Step 4: Simplify right side
    274.17x = 70,429.94
  5. Step 5: Solve for x
    x = 70,429.94/274.17
  6. Step 6: Final answer
    x = 256.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.