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Finding the Fourth Proportional to 274.80, 411.86 and 112.52

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Solution

The fourth proportional to 274.80, 411.86 and 112.52 is: 168.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.80 : 411.86 = 112.52 : x
  2. Step 2: Convert to fraction form
    274.80/411.86 = 112.52/x
  3. Step 3: Cross multiply
    274.80x = 411.86 × 112.52
  4. Step 4: Simplify right side
    274.80x = 46,342.49
  5. Step 5: Solve for x
    x = 46,342.49/274.80
  6. Step 6: Final answer
    x = 168.64

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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.