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Finding the Fourth Proportional to 274.89, 411.57 and 206.73

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Solution

The fourth proportional to 274.89, 411.57 and 206.73 is: 309.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.89 : 411.57 = 206.73 : x
  2. Step 2: Convert to fraction form
    274.89/411.57 = 206.73/x
  3. Step 3: Cross multiply
    274.89x = 411.57 × 206.73
  4. Step 4: Simplify right side
    274.89x = 85,083.87
  5. Step 5: Solve for x
    x = 85,083.87/274.89
  6. Step 6: Final answer
    x = 309.52

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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.