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Finding the Fourth Proportional to 238.80, 357.72 and 153.12

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Solution

The fourth proportional to 238.80, 357.72 and 153.12 is: 229.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.80 : 357.72 = 153.12 : x
  2. Step 2: Convert to fraction form
    238.80/357.72 = 153.12/x
  3. Step 3: Cross multiply
    238.80x = 357.72 × 153.12
  4. Step 4: Simplify right side
    238.80x = 54,774.09
  5. Step 5: Solve for x
    x = 54,774.09/238.80
  6. Step 6: Final answer
    x = 229.37

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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.