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Finding the Fourth Proportional to 238.05, 328.49 and 133.13

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Solution

The fourth proportional to 238.05, 328.49 and 133.13 is: 183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.05 : 328.49 = 133.13 : x
  2. Step 2: Convert to fraction form
    238.05/328.49 = 133.13/x
  3. Step 3: Cross multiply
    238.05x = 328.49 × 133.13
  4. Step 4: Simplify right side
    238.05x = 43,729.57
  5. Step 5: Solve for x
    x = 43,729.57/238.05
  6. Step 6: Final answer
    x = 183.70

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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.