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Finding the Fourth Proportional to 303.72, 418.56 and 203.96

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Solution

The fourth proportional to 303.72, 418.56 and 203.96 is: 281.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.72 : 418.56 = 203.96 : x
  2. Step 2: Convert to fraction form
    303.72/418.56 = 203.96/x
  3. Step 3: Cross multiply
    303.72x = 418.56 × 203.96
  4. Step 4: Simplify right side
    303.72x = 85,369.50
  5. Step 5: Solve for x
    x = 85,369.50/303.72
  6. Step 6: Final answer
    x = 281.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.