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Finding the Fourth Proportional to 203.96, 306.01 and 82.20

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Solution

The fourth proportional to 203.96, 306.01 and 82.20 is: 123.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.96 : 306.01 = 82.20 : x
  2. Step 2: Convert to fraction form
    203.96/306.01 = 82.20/x
  3. Step 3: Cross multiply
    203.96x = 306.01 × 82.20
  4. Step 4: Simplify right side
    203.96x = 25,154.02
  5. Step 5: Solve for x
    x = 25,154.02/203.96
  6. Step 6: Final answer
    x = 123.33

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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.