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Finding the Fourth Proportional to 664.45, 996.58 and 317.27

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Solution

The fourth proportional to 664.45, 996.58 and 317.27 is: 475.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.45 : 996.58 = 317.27 : x
  2. Step 2: Convert to fraction form
    664.45/996.58 = 317.27/x
  3. Step 3: Cross multiply
    664.45x = 996.58 × 317.27
  4. Step 4: Simplify right side
    664.45x = 316,181.33
  5. Step 5: Solve for x
    x = 316,181.33/664.45
  6. Step 6: Final answer
    x = 475.85

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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.