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Finding the Fourth Proportional to 189.40, 260.82 and 166.12

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Solution

The fourth proportional to 189.40, 260.82 and 166.12 is: 228.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.40 : 260.82 = 166.12 : x
  2. Step 2: Convert to fraction form
    189.40/260.82 = 166.12/x
  3. Step 3: Cross multiply
    189.40x = 260.82 × 166.12
  4. Step 4: Simplify right side
    189.40x = 43,327.42
  5. Step 5: Solve for x
    x = 43,327.42/189.40
  6. Step 6: Final answer
    x = 228.76

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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.