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Finding the Fourth Proportional to 664.78, 997.22 and 274.93

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Solution

The fourth proportional to 664.78, 997.22 and 274.93 is: 412.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.78 : 997.22 = 274.93 : x
  2. Step 2: Convert to fraction form
    664.78/997.22 = 274.93/x
  3. Step 3: Cross multiply
    664.78x = 997.22 × 274.93
  4. Step 4: Simplify right side
    664.78x = 274,165.69
  5. Step 5: Solve for x
    x = 274,165.69/664.78
  6. Step 6: Final answer
    x = 412.42

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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.