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Finding the Fourth Proportional to 216.54, 326.88 and 215.46

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Solution

The fourth proportional to 216.54, 326.88 and 215.46 is: 325.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.54 : 326.88 = 215.46 : x
  2. Step 2: Convert to fraction form
    216.54/326.88 = 215.46/x
  3. Step 3: Cross multiply
    216.54x = 326.88 × 215.46
  4. Step 4: Simplify right side
    216.54x = 70,429.56
  5. Step 5: Solve for x
    x = 70,429.56/216.54
  6. Step 6: Final answer
    x = 325.25

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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.