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Finding the Fourth Proportional to 239.28, 330.26 and 186.72

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Solution

The fourth proportional to 239.28, 330.26 and 186.72 is: 257.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.28 : 330.26 = 186.72 : x
  2. Step 2: Convert to fraction form
    239.28/330.26 = 186.72/x
  3. Step 3: Cross multiply
    239.28x = 330.26 × 186.72
  4. Step 4: Simplify right side
    239.28x = 61,665.21
  5. Step 5: Solve for x
    x = 61,665.21/239.28
  6. Step 6: Final answer
    x = 257.71

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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.