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Finding the Fourth Proportional to 223.31, 308.05 and 140.28

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Solution

The fourth proportional to 223.31, 308.05 and 140.28 is: 193.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.31 : 308.05 = 140.28 : x
  2. Step 2: Convert to fraction form
    223.31/308.05 = 140.28/x
  3. Step 3: Cross multiply
    223.31x = 308.05 × 140.28
  4. Step 4: Simplify right side
    223.31x = 43,214.27
  5. Step 5: Solve for x
    x = 43,214.27/223.31
  6. Step 6: Final answer
    x = 193.52

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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.