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Finding the Fourth Proportional to 259.22, 388.02 and 220.34

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Solution

The fourth proportional to 259.22, 388.02 and 220.34 is: 329.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.22 : 388.02 = 220.34 : x
  2. Step 2: Convert to fraction form
    259.22/388.02 = 220.34/x
  3. Step 3: Cross multiply
    259.22x = 388.02 × 220.34
  4. Step 4: Simplify right side
    259.22x = 85,496.33
  5. Step 5: Solve for x
    x = 85,496.33/259.22
  6. Step 6: Final answer
    x = 329.82

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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.