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Finding the Fourth Proportional to 940.86, 1,408.38 and 574.44

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Solution

The fourth proportional to 940.86, 1,408.38 and 574.44 is: 859.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.86 : 1,408.38 = 574.44 : x
  2. Step 2: Convert to fraction form
    940.86/1,408.38 = 574.44/x
  3. Step 3: Cross multiply
    940.86x = 1,408.38 × 574.44
  4. Step 4: Simplify right side
    940.86x = 809,029.81
  5. Step 5: Solve for x
    x = 809,029.81/940.86
  6. Step 6: Final answer
    x = 859.88

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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.