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Finding the Fourth Proportional to 239.32, 330.66 and 211.72

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Solution

The fourth proportional to 239.32, 330.66 and 211.72 is: 292.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.32 : 330.66 = 211.72 : x
  2. Step 2: Convert to fraction form
    239.32/330.66 = 211.72/x
  3. Step 3: Cross multiply
    239.32x = 330.66 × 211.72
  4. Step 4: Simplify right side
    239.32x = 70,007.34
  5. Step 5: Solve for x
    x = 70,007.34/239.32
  6. Step 6: Final answer
    x = 292.53

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Why These Related Problems?

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