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Finding the Fourth Proportional to 201.79, 302.20 and 133.25

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Solution

The fourth proportional to 201.79, 302.20 and 133.25 is: 199.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.79 : 302.20 = 133.25 : x
  2. Step 2: Convert to fraction form
    201.79/302.20 = 133.25/x
  3. Step 3: Cross multiply
    201.79x = 302.20 × 133.25
  4. Step 4: Simplify right side
    201.79x = 40,266.31
  5. Step 5: Solve for x
    x = 40,266.31/201.79
  6. Step 6: Final answer
    x = 199.54

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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.