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Finding the Fourth Proportional to 238.21, 328.72 and 133.29

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Solution

The fourth proportional to 238.21, 328.72 and 133.29 is: 183.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.21 : 328.72 = 133.29 : x
  2. Step 2: Convert to fraction form
    238.21/328.72 = 133.29/x
  3. Step 3: Cross multiply
    238.21x = 328.72 × 133.29
  4. Step 4: Simplify right side
    238.21x = 43,815.09
  5. Step 5: Solve for x
    x = 43,815.09/238.21
  6. Step 6: Final answer
    x = 183.93

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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.