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Finding the Fourth Proportional to 189.05, 284.67 and 135.32

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Solution

The fourth proportional to 189.05, 284.67 and 135.32 is: 203.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.05 : 284.67 = 135.32 : x
  2. Step 2: Convert to fraction form
    189.05/284.67 = 135.32/x
  3. Step 3: Cross multiply
    189.05x = 284.67 × 135.32
  4. Step 4: Simplify right side
    189.05x = 38,520.12
  5. Step 5: Solve for x
    x = 38,520.12/189.05
  6. Step 6: Final answer
    x = 203.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.