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Finding the Fourth Proportional to 238.88, 358 and 190.20

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Solution

The fourth proportional to 238.88, 358 and 190.20 is: 285.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.88 : 358 = 190.20 : x
  2. Step 2: Convert to fraction form
    238.88/358 = 190.20/x
  3. Step 3: Cross multiply
    238.88x = 358 × 190.20
  4. Step 4: Simplify right side
    238.88x = 68,091.60
  5. Step 5: Solve for x
    x = 68,091.60/238.88
  6. Step 6: Final answer
    x = 285.05

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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.