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Finding the Fourth Proportional to 274.19, 378.53 and 211.88

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Solution

The fourth proportional to 274.19, 378.53 and 211.88 is: 292.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.19 : 378.53 = 211.88 : x
  2. Step 2: Convert to fraction form
    274.19/378.53 = 211.88/x
  3. Step 3: Cross multiply
    274.19x = 378.53 × 211.88
  4. Step 4: Simplify right side
    274.19x = 80,202.82
  5. Step 5: Solve for x
    x = 80,202.82/274.19
  6. Step 6: Final answer
    x = 292.51

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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.