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Finding the Fourth Proportional to 251.20, 346.67 and 140.69

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Solution

The fourth proportional to 251.20, 346.67 and 140.69 is: 194.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.20 : 346.67 = 140.69 : x
  2. Step 2: Convert to fraction form
    251.20/346.67 = 140.69/x
  3. Step 3: Cross multiply
    251.20x = 346.67 × 140.69
  4. Step 4: Simplify right side
    251.20x = 48,774.63
  5. Step 5: Solve for x
    x = 48,774.63/251.20
  6. Step 6: Final answer
    x = 194.17

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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.