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Finding the Fourth Proportional to 238.50, 356.91 and 189.31

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Solution

The fourth proportional to 238.50, 356.91 and 189.31 is: 283.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.50 : 356.91 = 189.31 : x
  2. Step 2: Convert to fraction form
    238.50/356.91 = 189.31/x
  3. Step 3: Cross multiply
    238.50x = 356.91 × 189.31
  4. Step 4: Simplify right side
    238.50x = 67,566.63
  5. Step 5: Solve for x
    x = 67,566.63/238.50
  6. Step 6: Final answer
    x = 283.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.