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Finding the Fourth Proportional to 223.90, 308.99 and 135.39

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Solution

The fourth proportional to 223.90, 308.99 and 135.39 is: 186.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.90 : 308.99 = 135.39 : x
  2. Step 2: Convert to fraction form
    223.90/308.99 = 135.39/x
  3. Step 3: Cross multiply
    223.90x = 308.99 × 135.39
  4. Step 4: Simplify right side
    223.90x = 41,834.16
  5. Step 5: Solve for x
    x = 41,834.16/223.90
  6. Step 6: Final answer
    x = 186.84

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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.