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Finding the Fourth Proportional to 274.83, 381.81 and 272.28

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Solution

The fourth proportional to 274.83, 381.81 and 272.28 is: 378.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.83 : 381.81 = 272.28 : x
  2. Step 2: Convert to fraction form
    274.83/381.81 = 272.28/x
  3. Step 3: Cross multiply
    274.83x = 381.81 × 272.28
  4. Step 4: Simplify right side
    274.83x = 103,959.23
  5. Step 5: Solve for x
    x = 103,959.23/274.83
  6. Step 6: Final answer
    x = 378.27

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.