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Finding the Fourth Proportional to 274.02, 411.08 and 81.62

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Solution

The fourth proportional to 274.02, 411.08 and 81.62 is: 122.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.02 : 411.08 = 81.62 : x
  2. Step 2: Convert to fraction form
    274.02/411.08 = 81.62/x
  3. Step 3: Cross multiply
    274.02x = 411.08 × 81.62
  4. Step 4: Simplify right side
    274.02x = 33,552.35
  5. Step 5: Solve for x
    x = 33,552.35/274.02
  6. Step 6: Final answer
    x = 122.44

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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.