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Finding the Fourth Proportional to 221.67, 333.90 and 202.53

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Solution

The fourth proportional to 221.67, 333.90 and 202.53 is: 305.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.67 : 333.90 = 202.53 : x
  2. Step 2: Convert to fraction form
    221.67/333.90 = 202.53/x
  3. Step 3: Cross multiply
    221.67x = 333.90 × 202.53
  4. Step 4: Simplify right side
    221.67x = 67,624.77
  5. Step 5: Solve for x
    x = 67,624.77/221.67
  6. Step 6: Final answer
    x = 305.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.