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Finding the Fourth Proportional to 203.32, 280.36 and 161.40

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Solution

The fourth proportional to 203.32, 280.36 and 161.40 is: 222.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.32 : 280.36 = 161.40 : x
  2. Step 2: Convert to fraction form
    203.32/280.36 = 161.40/x
  3. Step 3: Cross multiply
    203.32x = 280.36 × 161.40
  4. Step 4: Simplify right side
    203.32x = 45,250.10
  5. Step 5: Solve for x
    x = 45,250.10/203.32
  6. Step 6: Final answer
    x = 222.56

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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.