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Finding the Fourth Proportional to 221.32, 333.91 and 220.71

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Solution

The fourth proportional to 221.32, 333.91 and 220.71 is: 332.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.32 : 333.91 = 220.71 : x
  2. Step 2: Convert to fraction form
    221.32/333.91 = 220.71/x
  3. Step 3: Cross multiply
    221.32x = 333.91 × 220.71
  4. Step 4: Simplify right side
    221.32x = 73,697.28
  5. Step 5: Solve for x
    x = 73,697.28/221.32
  6. Step 6: Final answer
    x = 332.99

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