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Finding the Fourth Proportional to 321.94, 481.07 and 218.36

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Solution

The fourth proportional to 321.94, 481.07 and 218.36 is: 326.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.94 : 481.07 = 218.36 : x
  2. Step 2: Convert to fraction form
    321.94/481.07 = 218.36/x
  3. Step 3: Cross multiply
    321.94x = 481.07 × 218.36
  4. Step 4: Simplify right side
    321.94x = 105,048.19
  5. Step 5: Solve for x
    x = 105,048.19/321.94
  6. Step 6: Final answer
    x = 326.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.