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Finding the Fourth Proportional to 251.21, 346.79 and 173.45

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Solution

The fourth proportional to 251.21, 346.79 and 173.45 is: 239.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.21 : 346.79 = 173.45 : x
  2. Step 2: Convert to fraction form
    251.21/346.79 = 173.45/x
  3. Step 3: Cross multiply
    251.21x = 346.79 × 173.45
  4. Step 4: Simplify right side
    251.21x = 60,149.43
  5. Step 5: Solve for x
    x = 60,149.43/251.21
  6. Step 6: Final answer
    x = 239.44

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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.