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Finding the Fourth Proportional to 223.09, 307.78 and 135.73

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Solution

The fourth proportional to 223.09, 307.78 and 135.73 is: 187.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.09 : 307.78 = 135.73 : x
  2. Step 2: Convert to fraction form
    223.09/307.78 = 135.73/x
  3. Step 3: Cross multiply
    223.09x = 307.78 × 135.73
  4. Step 4: Simplify right side
    223.09x = 41,774.98
  5. Step 5: Solve for x
    x = 41,774.98/223.09
  6. Step 6: Final answer
    x = 187.26

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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.