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Finding the Fourth Proportional to 220.60, 330.72 and 202.60

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Solution

The fourth proportional to 220.60, 330.72 and 202.60 is: 303.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.60 : 330.72 = 202.60 : x
  2. Step 2: Convert to fraction form
    220.60/330.72 = 202.60/x
  3. Step 3: Cross multiply
    220.60x = 330.72 × 202.60
  4. Step 4: Simplify right side
    220.60x = 67,003.87
  5. Step 5: Solve for x
    x = 67,003.87/220.60
  6. Step 6: Final answer
    x = 303.73

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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.