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Finding the Fourth Proportional to 203.10, 280.44 and 133.20

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Solution

The fourth proportional to 203.10, 280.44 and 133.20 is: 183.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.10 : 280.44 = 133.20 : x
  2. Step 2: Convert to fraction form
    203.10/280.44 = 133.20/x
  3. Step 3: Cross multiply
    203.10x = 280.44 × 133.20
  4. Step 4: Simplify right side
    203.10x = 37,354.61
  5. Step 5: Solve for x
    x = 37,354.61/203.10
  6. Step 6: Final answer
    x = 183.92

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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.