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Finding the Fourth Proportional to 203.86, 305.74 and 88.30

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Solution

The fourth proportional to 203.86, 305.74 and 88.30 is: 132.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.86 : 305.74 = 88.30 : x
  2. Step 2: Convert to fraction form
    203.86/305.74 = 88.30/x
  3. Step 3: Cross multiply
    203.86x = 305.74 × 88.30
  4. Step 4: Simplify right side
    203.86x = 26,996.84
  5. Step 5: Solve for x
    x = 26,996.84/203.86
  6. Step 6: Final answer
    x = 132.43

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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.