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Finding the Fourth Proportional to 223.36, 335.09 and 77.15

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Solution

The fourth proportional to 223.36, 335.09 and 77.15 is: 115.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.36 : 335.09 = 77.15 : x
  2. Step 2: Convert to fraction form
    223.36/335.09 = 77.15/x
  3. Step 3: Cross multiply
    223.36x = 335.09 × 77.15
  4. Step 4: Simplify right side
    223.36x = 25,852.79
  5. Step 5: Solve for x
    x = 25,852.79/223.36
  6. Step 6: Final answer
    x = 115.75

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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.