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Finding the Fourth Proportional to 171.45, 258.69 and 165.87

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Solution

The fourth proportional to 171.45, 258.69 and 165.87 is: 250.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.45 : 258.69 = 165.87 : x
  2. Step 2: Convert to fraction form
    171.45/258.69 = 165.87/x
  3. Step 3: Cross multiply
    171.45x = 258.69 × 165.87
  4. Step 4: Simplify right side
    171.45x = 42,908.91
  5. Step 5: Solve for x
    x = 42,908.91/171.45
  6. Step 6: Final answer
    x = 250.27

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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.