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Finding the Fourth Proportional to 189.72, 283.68 and 163.08

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Solution

The fourth proportional to 189.72, 283.68 and 163.08 is: 243.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.72 : 283.68 = 163.08 : x
  2. Step 2: Convert to fraction form
    189.72/283.68 = 163.08/x
  3. Step 3: Cross multiply
    189.72x = 283.68 × 163.08
  4. Step 4: Simplify right side
    189.72x = 46,262.53
  5. Step 5: Solve for x
    x = 46,262.53/189.72
  6. Step 6: Final answer
    x = 243.85

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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.