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Finding the Fourth Proportional to 165.30, 229.65 and 163.80

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Solution

The fourth proportional to 165.30, 229.65 and 163.80 is: 227.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.30 : 229.65 = 163.80 : x
  2. Step 2: Convert to fraction form
    165.30/229.65 = 163.80/x
  3. Step 3: Cross multiply
    165.30x = 229.65 × 163.80
  4. Step 4: Simplify right side
    165.30x = 37,616.67
  5. Step 5: Solve for x
    x = 37,616.67/165.30
  6. Step 6: Final answer
    x = 227.57

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.