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Finding the Fourth Proportional to 223.30, 308.11 and 140.34

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Solution

The fourth proportional to 223.30, 308.11 and 140.34 is: 193.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.30 : 308.11 = 140.34 : x
  2. Step 2: Convert to fraction form
    223.30/308.11 = 140.34/x
  3. Step 3: Cross multiply
    223.30x = 308.11 × 140.34
  4. Step 4: Simplify right side
    223.30x = 43,240.93
  5. Step 5: Solve for x
    x = 43,240.93/223.30
  6. Step 6: Final answer
    x = 193.65

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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.