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Finding the Fourth Proportional to 214.44, 321 and 170.82

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Solution

The fourth proportional to 214.44, 321 and 170.82 is: 255.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.44 : 321 = 170.82 : x
  2. Step 2: Convert to fraction form
    214.44/321 = 170.82/x
  3. Step 3: Cross multiply
    214.44x = 321 × 170.82
  4. Step 4: Simplify right side
    214.44x = 54,833.22
  5. Step 5: Solve for x
    x = 54,833.22/214.44
  6. Step 6: Final answer
    x = 255.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.