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Finding the Fourth Proportional to 203.81, 280.54 and 187.88

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Solution

The fourth proportional to 203.81, 280.54 and 187.88 is: 258.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.81 : 280.54 = 187.88 : x
  2. Step 2: Convert to fraction form
    203.81/280.54 = 187.88/x
  3. Step 3: Cross multiply
    203.81x = 280.54 × 187.88
  4. Step 4: Simplify right side
    203.81x = 52,707.86
  5. Step 5: Solve for x
    x = 52,707.86/203.81
  6. Step 6: Final answer
    x = 258.61

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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.