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Finding the Fourth Proportional to 223.44, 308.40 and 144.75

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Solution

The fourth proportional to 223.44, 308.40 and 144.75 is: 199.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.44 : 308.40 = 144.75 : x
  2. Step 2: Convert to fraction form
    223.44/308.40 = 144.75/x
  3. Step 3: Cross multiply
    223.44x = 308.40 × 144.75
  4. Step 4: Simplify right side
    223.44x = 44,640.90
  5. Step 5: Solve for x
    x = 44,640.90/223.44
  6. Step 6: Final answer
    x = 199.79

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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.