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Finding the Fourth Proportional to 189.50, 283.86 and 108.38

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Solution

The fourth proportional to 189.50, 283.86 and 108.38 is: 162.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.50 : 283.86 = 108.38 : x
  2. Step 2: Convert to fraction form
    189.50/283.86 = 108.38/x
  3. Step 3: Cross multiply
    189.50x = 283.86 × 108.38
  4. Step 4: Simplify right side
    189.50x = 30,764.75
  5. Step 5: Solve for x
    x = 30,764.75/189.50
  6. Step 6: Final answer
    x = 162.35

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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.