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Finding the Fourth Proportional to 239.02, 356.87 and 211.42

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Solution

The fourth proportional to 239.02, 356.87 and 211.42 is: 315.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.02 : 356.87 = 211.42 : x
  2. Step 2: Convert to fraction form
    239.02/356.87 = 211.42/x
  3. Step 3: Cross multiply
    239.02x = 356.87 × 211.42
  4. Step 4: Simplify right side
    239.02x = 75,449.46
  5. Step 5: Solve for x
    x = 75,449.46/239.02
  6. Step 6: Final answer
    x = 315.66

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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.