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Finding the Fourth Proportional to 274.92, 411.91 and 159.46

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Solution

The fourth proportional to 274.92, 411.91 and 159.46 is: 238.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.92 : 411.91 = 159.46 : x
  2. Step 2: Convert to fraction form
    274.92/411.91 = 159.46/x
  3. Step 3: Cross multiply
    274.92x = 411.91 × 159.46
  4. Step 4: Simplify right side
    274.92x = 65,683.17
  5. Step 5: Solve for x
    x = 65,683.17/274.92
  6. Step 6: Final answer
    x = 238.92

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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.