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Finding the Fourth Proportional to 165.15, 249.21 and 159.12

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Solution

The fourth proportional to 165.15, 249.21 and 159.12 is: 240.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.15 : 249.21 = 159.12 : x
  2. Step 2: Convert to fraction form
    165.15/249.21 = 159.12/x
  3. Step 3: Cross multiply
    165.15x = 249.21 × 159.12
  4. Step 4: Simplify right side
    165.15x = 39,654.30
  5. Step 5: Solve for x
    x = 39,654.30/165.15
  6. Step 6: Final answer
    x = 240.11

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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.