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Finding the Fourth Proportional to 455.32, 682.17 and 311.68

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Solution

The fourth proportional to 455.32, 682.17 and 311.68 is: 466.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.32 : 682.17 = 311.68 : x
  2. Step 2: Convert to fraction form
    455.32/682.17 = 311.68/x
  3. Step 3: Cross multiply
    455.32x = 682.17 × 311.68
  4. Step 4: Simplify right side
    455.32x = 212,618.75
  5. Step 5: Solve for x
    x = 212,618.75/455.32
  6. Step 6: Final answer
    x = 466.97

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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.