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Finding the Fourth Proportional to 272.21, 407.90 and 251.96

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Solution

The fourth proportional to 272.21, 407.90 and 251.96 is: 377.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.21 : 407.90 = 251.96 : x
  2. Step 2: Convert to fraction form
    272.21/407.90 = 251.96/x
  3. Step 3: Cross multiply
    272.21x = 407.90 × 251.96
  4. Step 4: Simplify right side
    272.21x = 102,773.07
  5. Step 5: Solve for x
    x = 102,773.07/272.21
  6. Step 6: Final answer
    x = 377.56

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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.