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Finding the Fourth Proportional to 206.60, 285 and 167.72

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Solution

The fourth proportional to 206.60, 285 and 167.72 is: 231.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.60 : 285 = 167.72 : x
  2. Step 2: Convert to fraction form
    206.60/285 = 167.72/x
  3. Step 3: Cross multiply
    206.60x = 285 × 167.72
  4. Step 4: Simplify right side
    206.60x = 47,800.20
  5. Step 5: Solve for x
    x = 47,800.20/206.60
  6. Step 6: Final answer
    x = 231.37

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.