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Finding the Fourth Proportional to 171.10, 255.38 and 148.42

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Solution

The fourth proportional to 171.10, 255.38 and 148.42 is: 221.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.10 : 255.38 = 148.42 : x
  2. Step 2: Convert to fraction form
    171.10/255.38 = 148.42/x
  3. Step 3: Cross multiply
    171.10x = 255.38 × 148.42
  4. Step 4: Simplify right side
    171.10x = 37,903.50
  5. Step 5: Solve for x
    x = 37,903.50/171.10
  6. Step 6: Final answer
    x = 221.53

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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.