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Finding the Fourth Proportional to 165.24, 249.08 and 156.42

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Solution

The fourth proportional to 165.24, 249.08 and 156.42 is: 235.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.24 : 249.08 = 156.42 : x
  2. Step 2: Convert to fraction form
    165.24/249.08 = 156.42/x
  3. Step 3: Cross multiply
    165.24x = 249.08 × 156.42
  4. Step 4: Simplify right side
    165.24x = 38,960.31
  5. Step 5: Solve for x
    x = 38,960.31/165.24
  6. Step 6: Final answer
    x = 235.78

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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.