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Finding the Fourth Proportional to 218.94, 330.91 and 216.51

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Solution

The fourth proportional to 218.94, 330.91 and 216.51 is: 327.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.94 : 330.91 = 216.51 : x
  2. Step 2: Convert to fraction form
    218.94/330.91 = 216.51/x
  3. Step 3: Cross multiply
    218.94x = 330.91 × 216.51
  4. Step 4: Simplify right side
    218.94x = 71,645.32
  5. Step 5: Solve for x
    x = 71,645.32/218.94
  6. Step 6: Final answer
    x = 327.24

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.