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Finding the Fourth Proportional to 165.49, 249.21 and 122.46

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Solution

The fourth proportional to 165.49, 249.21 and 122.46 is: 184.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.49 : 249.21 = 122.46 : x
  2. Step 2: Convert to fraction form
    165.49/249.21 = 122.46/x
  3. Step 3: Cross multiply
    165.49x = 249.21 × 122.46
  4. Step 4: Simplify right side
    165.49x = 30,517.67
  5. Step 5: Solve for x
    x = 30,517.67/165.49
  6. Step 6: Final answer
    x = 184.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.