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Finding the Fourth Proportional to 168.98, 251.85 and 168.71

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Solution

The fourth proportional to 168.98, 251.85 and 168.71 is: 251.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.98 : 251.85 = 168.71 : x
  2. Step 2: Convert to fraction form
    168.98/251.85 = 168.71/x
  3. Step 3: Cross multiply
    168.98x = 251.85 × 168.71
  4. Step 4: Simplify right side
    168.98x = 42,488.77
  5. Step 5: Solve for x
    x = 42,488.77/168.98
  6. Step 6: Final answer
    x = 251.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.