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Finding the Fourth Proportional to 166.45, 248.38 and 144.58

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Solution

The fourth proportional to 166.45, 248.38 and 144.58 is: 215.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.45 : 248.38 = 144.58 : x
  2. Step 2: Convert to fraction form
    166.45/248.38 = 144.58/x
  3. Step 3: Cross multiply
    166.45x = 248.38 × 144.58
  4. Step 4: Simplify right side
    166.45x = 35,910.78
  5. Step 5: Solve for x
    x = 35,910.78/166.45
  6. Step 6: Final answer
    x = 215.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.