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Finding the Fourth Proportional to 254.37, 380.68 and 211.12

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Solution

The fourth proportional to 254.37, 380.68 and 211.12 is: 315.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.37 : 380.68 = 211.12 : x
  2. Step 2: Convert to fraction form
    254.37/380.68 = 211.12/x
  3. Step 3: Cross multiply
    254.37x = 380.68 × 211.12
  4. Step 4: Simplify right side
    254.37x = 80,369.11
  5. Step 5: Solve for x
    x = 80,369.11/254.37
  6. Step 6: Final answer
    x = 315.95

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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.