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Finding the Fourth Proportional to 214.22, 321.32 and 51.90

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Solution

The fourth proportional to 214.22, 321.32 and 51.90 is: 77.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.22 : 321.32 = 51.90 : x
  2. Step 2: Convert to fraction form
    214.22/321.32 = 51.90/x
  3. Step 3: Cross multiply
    214.22x = 321.32 × 51.90
  4. Step 4: Simplify right side
    214.22x = 16,676.55
  5. Step 5: Solve for x
    x = 16,676.55/214.22
  6. Step 6: Final answer
    x = 77.85

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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.