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Finding the Fourth Proportional to 231.72, 347.82 and 170.65

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Solution

The fourth proportional to 231.72, 347.82 and 170.65 is: 256.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.72 : 347.82 = 170.65 : x
  2. Step 2: Convert to fraction form
    231.72/347.82 = 170.65/x
  3. Step 3: Cross multiply
    231.72x = 347.82 × 170.65
  4. Step 4: Simplify right side
    231.72x = 59,355.48
  5. Step 5: Solve for x
    x = 59,355.48/231.72
  6. Step 6: Final answer
    x = 256.15

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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.