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Finding the Fourth Proportional to 214.88, 324.08 and 212.44

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Solution

The fourth proportional to 214.88, 324.08 and 212.44 is: 320.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.88 : 324.08 = 212.44 : x
  2. Step 2: Convert to fraction form
    214.88/324.08 = 212.44/x
  3. Step 3: Cross multiply
    214.88x = 324.08 × 212.44
  4. Step 4: Simplify right side
    214.88x = 68,847.56
  5. Step 5: Solve for x
    x = 68,847.56/214.88
  6. Step 6: Final answer
    x = 320.40

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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.