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Finding the Fourth Proportional to 251.21, 375.31 and 249.86

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Solution

The fourth proportional to 251.21, 375.31 and 249.86 is: 373.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.21 : 375.31 = 249.86 : x
  2. Step 2: Convert to fraction form
    251.21/375.31 = 249.86/x
  3. Step 3: Cross multiply
    251.21x = 375.31 × 249.86
  4. Step 4: Simplify right side
    251.21x = 93,774.96
  5. Step 5: Solve for x
    x = 93,774.96/251.21
  6. Step 6: Final answer
    x = 373.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.