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Finding the Fourth Proportional to 294.22, 440.79 and 212.86

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Solution

The fourth proportional to 294.22, 440.79 and 212.86 is: 318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.22 : 440.79 = 212.86 : x
  2. Step 2: Convert to fraction form
    294.22/440.79 = 212.86/x
  3. Step 3: Cross multiply
    294.22x = 440.79 × 212.86
  4. Step 4: Simplify right side
    294.22x = 93,826.56
  5. Step 5: Solve for x
    x = 93,826.56/294.22
  6. Step 6: Final answer
    x = 318.90

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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.