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Finding the Fourth Proportional to 28.17, 42.20 and 23.68

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Solution

The fourth proportional to 28.17, 42.20 and 23.68 is: 35.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.17 : 42.20 = 23.68 : x
  2. Step 2: Convert to fraction form
    28.17/42.20 = 23.68/x
  3. Step 3: Cross multiply
    28.17x = 42.20 × 23.68
  4. Step 4: Simplify right side
    28.17x = 999.30
  5. Step 5: Solve for x
    x = 999.30/28.17
  6. Step 6: Final answer
    x = 35.47

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