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Finding the Fourth Proportional to 229.15, 343.65 and 75.05

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Solution

The fourth proportional to 229.15, 343.65 and 75.05 is: 112.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.15 : 343.65 = 75.05 : x
  2. Step 2: Convert to fraction form
    229.15/343.65 = 75.05/x
  3. Step 3: Cross multiply
    229.15x = 343.65 × 75.05
  4. Step 4: Simplify right side
    229.15x = 25,789.82
  5. Step 5: Solve for x
    x = 25,789.82/229.15
  6. Step 6: Final answer
    x = 112.54

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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.