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Finding the Fourth Proportional to 351.22, 527.09 and 168.72

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Solution

The fourth proportional to 351.22, 527.09 and 168.72 is: 253.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.22 : 527.09 = 168.72 : x
  2. Step 2: Convert to fraction form
    351.22/527.09 = 168.72/x
  3. Step 3: Cross multiply
    351.22x = 527.09 × 168.72
  4. Step 4: Simplify right side
    351.22x = 88,930.62
  5. Step 5: Solve for x
    x = 88,930.62/351.22
  6. Step 6: Final answer
    x = 253.20

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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.