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Finding the Fourth Proportional to 203.53, 280.87 and 154.32

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Solution

The fourth proportional to 203.53, 280.87 and 154.32 is: 212.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.53 : 280.87 = 154.32 : x
  2. Step 2: Convert to fraction form
    203.53/280.87 = 154.32/x
  3. Step 3: Cross multiply
    203.53x = 280.87 × 154.32
  4. Step 4: Simplify right side
    203.53x = 43,343.86
  5. Step 5: Solve for x
    x = 43,343.86/203.53
  6. Step 6: Final answer
    x = 212.96

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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.