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Finding the Fourth Proportional to 251.25, 346.72 and 140.72

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Solution

The fourth proportional to 251.25, 346.72 and 140.72 is: 194.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.25 : 346.72 = 140.72 : x
  2. Step 2: Convert to fraction form
    251.25/346.72 = 140.72/x
  3. Step 3: Cross multiply
    251.25x = 346.72 × 140.72
  4. Step 4: Simplify right side
    251.25x = 48,790.44
  5. Step 5: Solve for x
    x = 48,790.44/251.25
  6. Step 6: Final answer
    x = 194.19

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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.