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Finding the Fourth Proportional to 251.72, 378 and 174.92

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Solution

The fourth proportional to 251.72, 378 and 174.92 is: 262.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.72 : 378 = 174.92 : x
  2. Step 2: Convert to fraction form
    251.72/378 = 174.92/x
  3. Step 3: Cross multiply
    251.72x = 378 × 174.92
  4. Step 4: Simplify right side
    251.72x = 66,119.76
  5. Step 5: Solve for x
    x = 66,119.76/251.72
  6. Step 6: Final answer
    x = 262.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.