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Finding the Fourth Proportional to 217.36, 328.12 and 216.14

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Solution

The fourth proportional to 217.36, 328.12 and 216.14 is: 326.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.36 : 328.12 = 216.14 : x
  2. Step 2: Convert to fraction form
    217.36/328.12 = 216.14/x
  3. Step 3: Cross multiply
    217.36x = 328.12 × 216.14
  4. Step 4: Simplify right side
    217.36x = 70,920.14
  5. Step 5: Solve for x
    x = 70,920.14/217.36
  6. Step 6: Final answer
    x = 326.28

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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.