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Finding the Fourth Proportional to 238.78, 356.32 and 236.98

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Solution

The fourth proportional to 238.78, 356.32 and 236.98 is: 353.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.78 : 356.32 = 236.98 : x
  2. Step 2: Convert to fraction form
    238.78/356.32 = 236.98/x
  3. Step 3: Cross multiply
    238.78x = 356.32 × 236.98
  4. Step 4: Simplify right side
    238.78x = 84,440.71
  5. Step 5: Solve for x
    x = 84,440.71/238.78
  6. Step 6: Final answer
    x = 353.63

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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.