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Finding the Fourth Proportional to 171.44, 256.05 and 148.36

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Solution

The fourth proportional to 171.44, 256.05 and 148.36 is: 221.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.44 : 256.05 = 148.36 : x
  2. Step 2: Convert to fraction form
    171.44/256.05 = 148.36/x
  3. Step 3: Cross multiply
    171.44x = 256.05 × 148.36
  4. Step 4: Simplify right side
    171.44x = 37,986.49
  5. Step 5: Solve for x
    x = 37,986.49/171.44
  6. Step 6: Final answer
    x = 221.57

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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.