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Finding the Fourth Proportional to 294.21, 441.09 and 120.78

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Solution

The fourth proportional to 294.21, 441.09 and 120.78 is: 181.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.21 : 441.09 = 120.78 : x
  2. Step 2: Convert to fraction form
    294.21/441.09 = 120.78/x
  3. Step 3: Cross multiply
    294.21x = 441.09 × 120.78
  4. Step 4: Simplify right side
    294.21x = 53,274.85
  5. Step 5: Solve for x
    x = 53,274.85/294.21
  6. Step 6: Final answer
    x = 181.08

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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.