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Finding the Fourth Proportional to 223.25, 308.15 and 135.96

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Solution

The fourth proportional to 223.25, 308.15 and 135.96 is: 187.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.25 : 308.15 = 135.96 : x
  2. Step 2: Convert to fraction form
    223.25/308.15 = 135.96/x
  3. Step 3: Cross multiply
    223.25x = 308.15 × 135.96
  4. Step 4: Simplify right side
    223.25x = 41,895.39
  5. Step 5: Solve for x
    x = 41,895.39/223.25
  6. Step 6: Final answer
    x = 187.67

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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.