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Finding the Fourth Proportional to 223.85, 308.87 and 135.31

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Solution

The fourth proportional to 223.85, 308.87 and 135.31 is: 186.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.85 : 308.87 = 135.31 : x
  2. Step 2: Convert to fraction form
    223.85/308.87 = 135.31/x
  3. Step 3: Cross multiply
    223.85x = 308.87 × 135.31
  4. Step 4: Simplify right side
    223.85x = 41,792.77
  5. Step 5: Solve for x
    x = 41,792.77/223.85
  6. Step 6: Final answer
    x = 186.70

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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.