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Finding the Fourth Proportional to 209.67, 289.13 and 170.25

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Solution

The fourth proportional to 209.67, 289.13 and 170.25 is: 234.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.67 : 289.13 = 170.25 : x
  2. Step 2: Convert to fraction form
    209.67/289.13 = 170.25/x
  3. Step 3: Cross multiply
    209.67x = 289.13 × 170.25
  4. Step 4: Simplify right side
    209.67x = 49,223.53
  5. Step 5: Solve for x
    x = 49,223.53/209.67
  6. Step 6: Final answer
    x = 234.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.