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Finding the Fourth Proportional to 221.58, 330.44 and 203.87

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Solution

The fourth proportional to 221.58, 330.44 and 203.87 is: 304.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.58 : 330.44 = 203.87 : x
  2. Step 2: Convert to fraction form
    221.58/330.44 = 203.87/x
  3. Step 3: Cross multiply
    221.58x = 330.44 × 203.87
  4. Step 4: Simplify right side
    221.58x = 67,364.13
  5. Step 5: Solve for x
    x = 67,364.13/221.58
  6. Step 6: Final answer
    x = 304.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.