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Finding the Fourth Proportional to 209.72, 314.12 and 166.44

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Solution

The fourth proportional to 209.72, 314.12 and 166.44 is: 249.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.72 : 314.12 = 166.44 : x
  2. Step 2: Convert to fraction form
    209.72/314.12 = 166.44/x
  3. Step 3: Cross multiply
    209.72x = 314.12 × 166.44
  4. Step 4: Simplify right side
    209.72x = 52,280.15
  5. Step 5: Solve for x
    x = 52,280.15/209.72
  6. Step 6: Final answer
    x = 249.29

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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.