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Finding the Fourth Proportional to 189.52, 260.86 and 169.78

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Solution

The fourth proportional to 189.52, 260.86 and 169.78 is: 233.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.52 : 260.86 = 169.78 : x
  2. Step 2: Convert to fraction form
    189.52/260.86 = 169.78/x
  3. Step 3: Cross multiply
    189.52x = 260.86 × 169.78
  4. Step 4: Simplify right side
    189.52x = 44,288.81
  5. Step 5: Solve for x
    x = 44,288.81/189.52
  6. Step 6: Final answer
    x = 233.69

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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.