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Finding the Fourth Proportional to 203.26, 304.79 and 73.21

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Solution

The fourth proportional to 203.26, 304.79 and 73.21 is: 109.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.26 : 304.79 = 73.21 : x
  2. Step 2: Convert to fraction form
    203.26/304.79 = 73.21/x
  3. Step 3: Cross multiply
    203.26x = 304.79 × 73.21
  4. Step 4: Simplify right side
    203.26x = 22,313.31
  5. Step 5: Solve for x
    x = 22,313.31/203.26
  6. Step 6: Final answer
    x = 109.78

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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.