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Finding the Fourth Proportional to 274.57, 411.48 and 112.21

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Solution

The fourth proportional to 274.57, 411.48 and 112.21 is: 168.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.57 : 411.48 = 112.21 : x
  2. Step 2: Convert to fraction form
    274.57/411.48 = 112.21/x
  3. Step 3: Cross multiply
    274.57x = 411.48 × 112.21
  4. Step 4: Simplify right side
    274.57x = 46,172.17
  5. Step 5: Solve for x
    x = 46,172.17/274.57
  6. Step 6: Final answer
    x = 168.16

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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.