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Finding the Fourth Proportional to 238.98, 330.12 and 190.20

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Solution

The fourth proportional to 238.98, 330.12 and 190.20 is: 262.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.98 : 330.12 = 190.20 : x
  2. Step 2: Convert to fraction form
    238.98/330.12 = 190.20/x
  3. Step 3: Cross multiply
    238.98x = 330.12 × 190.20
  4. Step 4: Simplify right side
    238.98x = 62,788.82
  5. Step 5: Solve for x
    x = 62,788.82/238.98
  6. Step 6: Final answer
    x = 262.74

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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.