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Finding the Fourth Proportional to 201.92, 302.88 and 71.88

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Solution

The fourth proportional to 201.92, 302.88 and 71.88 is: 107.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.92 : 302.88 = 71.88 : x
  2. Step 2: Convert to fraction form
    201.92/302.88 = 71.88/x
  3. Step 3: Cross multiply
    201.92x = 302.88 × 71.88
  4. Step 4: Simplify right side
    201.92x = 21,771.01
  5. Step 5: Solve for x
    x = 21,771.01/201.92
  6. Step 6: Final answer
    x = 107.82

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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.