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Finding the Fourth Proportional to 223.64, 308.73 and 140.79

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Solution

The fourth proportional to 223.64, 308.73 and 140.79 is: 194.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.64 : 308.73 = 140.79 : x
  2. Step 2: Convert to fraction form
    223.64/308.73 = 140.79/x
  3. Step 3: Cross multiply
    223.64x = 308.73 × 140.79
  4. Step 4: Simplify right side
    223.64x = 43,466.10
  5. Step 5: Solve for x
    x = 43,466.10/223.64
  6. Step 6: Final answer
    x = 194.36

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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.