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Finding the Fourth Proportional to 158.28, 236.21 and 133.48

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Solution

The fourth proportional to 158.28, 236.21 and 133.48 is: 199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.28 : 236.21 = 133.48 : x
  2. Step 2: Convert to fraction form
    158.28/236.21 = 133.48/x
  3. Step 3: Cross multiply
    158.28x = 236.21 × 133.48
  4. Step 4: Simplify right side
    158.28x = 31,529.31
  5. Step 5: Solve for x
    x = 31,529.31/158.28
  6. Step 6: Final answer
    x = 199.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.