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Finding the Fourth Proportional to 940.01, 1,408.41 and 664.75

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Solution

The fourth proportional to 940.01, 1,408.41 and 664.75 is: 996.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.01 : 1,408.41 = 664.75 : x
  2. Step 2: Convert to fraction form
    940.01/1,408.41 = 664.75/x
  3. Step 3: Cross multiply
    940.01x = 1,408.41 × 664.75
  4. Step 4: Simplify right side
    940.01x = 936,240.55
  5. Step 5: Solve for x
    x = 936,240.55/940.01
  6. Step 6: Final answer
    x = 996.00

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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.