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Finding the Fourth Proportional to 251.38, 346.91 and 189.11

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Solution

The fourth proportional to 251.38, 346.91 and 189.11 is: 260.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.38 : 346.91 = 189.11 : x
  2. Step 2: Convert to fraction form
    251.38/346.91 = 189.11/x
  3. Step 3: Cross multiply
    251.38x = 346.91 × 189.11
  4. Step 4: Simplify right side
    251.38x = 65,604.15
  5. Step 5: Solve for x
    x = 65,604.15/251.38
  6. Step 6: Final answer
    x = 260.98

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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.