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Finding the Fourth Proportional to 293.86, 440.74 and 111.21

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Solution

The fourth proportional to 293.86, 440.74 and 111.21 is: 166.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.86 : 440.74 = 111.21 : x
  2. Step 2: Convert to fraction form
    293.86/440.74 = 111.21/x
  3. Step 3: Cross multiply
    293.86x = 440.74 × 111.21
  4. Step 4: Simplify right side
    293.86x = 49,012.49
  5. Step 5: Solve for x
    x = 49,012.49/293.86
  6. Step 6: Final answer
    x = 166.79

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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.