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Finding the Fourth Proportional to 189.38, 259.50 and 186.81

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Solution

The fourth proportional to 189.38, 259.50 and 186.81 is: 255.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.38 : 259.50 = 186.81 : x
  2. Step 2: Convert to fraction form
    189.38/259.50 = 186.81/x
  3. Step 3: Cross multiply
    189.38x = 259.50 × 186.81
  4. Step 4: Simplify right side
    189.38x = 48,477.20
  5. Step 5: Solve for x
    x = 48,477.20/189.38
  6. Step 6: Final answer
    x = 255.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.