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Finding the Fourth Proportional to 236.31, 325.89 and 211.70

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Solution

The fourth proportional to 236.31, 325.89 and 211.70 is: 291.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.31 : 325.89 = 211.70 : x
  2. Step 2: Convert to fraction form
    236.31/325.89 = 211.70/x
  3. Step 3: Cross multiply
    236.31x = 325.89 × 211.70
  4. Step 4: Simplify right side
    236.31x = 68,990.91
  5. Step 5: Solve for x
    x = 68,990.91/236.31
  6. Step 6: Final answer
    x = 291.95

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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.