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Finding the Fourth Proportional to 216.33, 323.18 and 212.49

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Solution

The fourth proportional to 216.33, 323.18 and 212.49 is: 317.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.33 : 323.18 = 212.49 : x
  2. Step 2: Convert to fraction form
    216.33/323.18 = 212.49/x
  3. Step 3: Cross multiply
    216.33x = 323.18 × 212.49
  4. Step 4: Simplify right side
    216.33x = 68,671.46
  5. Step 5: Solve for x
    x = 68,671.46/216.33
  6. Step 6: Final answer
    x = 317.44

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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.