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Finding the Fourth Proportional to 165.39, 226.90 and 154.91

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Solution

The fourth proportional to 165.39, 226.90 and 154.91 is: 212.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.39 : 226.90 = 154.91 : x
  2. Step 2: Convert to fraction form
    165.39/226.90 = 154.91/x
  3. Step 3: Cross multiply
    165.39x = 226.90 × 154.91
  4. Step 4: Simplify right side
    165.39x = 35,149.84
  5. Step 5: Solve for x
    x = 35,149.84/165.39
  6. Step 6: Final answer
    x = 212.52

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.