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Finding the Fourth Proportional to 231.42, 347.30 and 170.71

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Solution

The fourth proportional to 231.42, 347.30 and 170.71 is: 256.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.42 : 347.30 = 170.71 : x
  2. Step 2: Convert to fraction form
    231.42/347.30 = 170.71/x
  3. Step 3: Cross multiply
    231.42x = 347.30 × 170.71
  4. Step 4: Simplify right side
    231.42x = 59,286.50
  5. Step 5: Solve for x
    x = 59,286.50/231.42
  6. Step 6: Final answer
    x = 256.18

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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.