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Finding the Fourth Proportional to 171.40, 258.18 and 141.34

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Solution

The fourth proportional to 171.40, 258.18 and 141.34 is: 212.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.40 : 258.18 = 141.34 : x
  2. Step 2: Convert to fraction form
    171.40/258.18 = 141.34/x
  3. Step 3: Cross multiply
    171.40x = 258.18 × 141.34
  4. Step 4: Simplify right side
    171.40x = 36,491.16
  5. Step 5: Solve for x
    x = 36,491.16/171.40
  6. Step 6: Final answer
    x = 212.90

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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.