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Finding the Fourth Proportional to 239.44, 356.66 and 213.52

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Solution

The fourth proportional to 239.44, 356.66 and 213.52 is: 318.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.44 : 356.66 = 213.52 : x
  2. Step 2: Convert to fraction form
    239.44/356.66 = 213.52/x
  3. Step 3: Cross multiply
    239.44x = 356.66 × 213.52
  4. Step 4: Simplify right side
    239.44x = 76,154.04
  5. Step 5: Solve for x
    x = 76,154.04/239.44
  6. Step 6: Final answer
    x = 318.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.