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Finding the Fourth Proportional to 189.67, 284.46 and 112.60

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Solution

The fourth proportional to 189.67, 284.46 and 112.60 is: 168.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.67 : 284.46 = 112.60 : x
  2. Step 2: Convert to fraction form
    189.67/284.46 = 112.60/x
  3. Step 3: Cross multiply
    189.67x = 284.46 × 112.60
  4. Step 4: Simplify right side
    189.67x = 32,030.20
  5. Step 5: Solve for x
    x = 32,030.20/189.67
  6. Step 6: Final answer
    x = 168.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.