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Finding the Fourth Proportional to 274.74, 378.82 and 225.46

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Solution

The fourth proportional to 274.74, 378.82 and 225.46 is: 310.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.74 : 378.82 = 225.46 : x
  2. Step 2: Convert to fraction form
    274.74/378.82 = 225.46/x
  3. Step 3: Cross multiply
    274.74x = 378.82 × 225.46
  4. Step 4: Simplify right side
    274.74x = 85,408.76
  5. Step 5: Solve for x
    x = 85,408.76/274.74
  6. Step 6: Final answer
    x = 310.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.