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Finding the Fourth Proportional to 223.75, 335.40 and 136.90

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Solution

The fourth proportional to 223.75, 335.40 and 136.90 is: 205.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.75 : 335.40 = 136.90 : x
  2. Step 2: Convert to fraction form
    223.75/335.40 = 136.90/x
  3. Step 3: Cross multiply
    223.75x = 335.40 × 136.90
  4. Step 4: Simplify right side
    223.75x = 45,916.26
  5. Step 5: Solve for x
    x = 45,916.26/223.75
  6. Step 6: Final answer
    x = 205.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.