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Finding the Fourth Proportional to 209.92, 289.60 and 132.28

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Solution

The fourth proportional to 209.92, 289.60 and 132.28 is: 182.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.92 : 289.60 = 132.28 : x
  2. Step 2: Convert to fraction form
    209.92/289.60 = 132.28/x
  3. Step 3: Cross multiply
    209.92x = 289.60 × 132.28
  4. Step 4: Simplify right side
    209.92x = 38,308.29
  5. Step 5: Solve for x
    x = 38,308.29/209.92
  6. Step 6: Final answer
    x = 182.49

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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.