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Finding the Fourth Proportional to 441.21, 661.91 and 167.30

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Solution

The fourth proportional to 441.21, 661.91 and 167.30 is: 250.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.21 : 661.91 = 167.30 : x
  2. Step 2: Convert to fraction form
    441.21/661.91 = 167.30/x
  3. Step 3: Cross multiply
    441.21x = 661.91 × 167.30
  4. Step 4: Simplify right side
    441.21x = 110,737.95
  5. Step 5: Solve for x
    x = 110,737.95/441.21
  6. Step 6: Final answer
    x = 250.99

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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.