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Finding the Fourth Proportional to 171.28, 256.40 and 110.45

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Solution

The fourth proportional to 171.28, 256.40 and 110.45 is: 165.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.28 : 256.40 = 110.45 : x
  2. Step 2: Convert to fraction form
    171.28/256.40 = 110.45/x
  3. Step 3: Cross multiply
    171.28x = 256.40 × 110.45
  4. Step 4: Simplify right side
    171.28x = 28,318.83
  5. Step 5: Solve for x
    x = 28,318.83/171.28
  6. Step 6: Final answer
    x = 165.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.