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Finding the Fourth Proportional to 251.68, 376.92 and 141.72

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Solution

The fourth proportional to 251.68, 376.92 and 141.72 is: 212.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.68 : 376.92 = 141.72 : x
  2. Step 2: Convert to fraction form
    251.68/376.92 = 141.72/x
  3. Step 3: Cross multiply
    251.68x = 376.92 × 141.72
  4. Step 4: Simplify right side
    251.68x = 53,415.89
  5. Step 5: Solve for x
    x = 53,415.89/251.68
  6. Step 6: Final answer
    x = 212.24

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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.