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Finding the Fourth Proportional to 799.19, 1,198.23 and 311.67

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Solution

The fourth proportional to 799.19, 1,198.23 and 311.67 is: 467.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.19 : 1,198.23 = 311.67 : x
  2. Step 2: Convert to fraction form
    799.19/1,198.23 = 311.67/x
  3. Step 3: Cross multiply
    799.19x = 1,198.23 × 311.67
  4. Step 4: Simplify right side
    799.19x = 373,452.34
  5. Step 5: Solve for x
    x = 373,452.34/799.19
  6. Step 6: Final answer
    x = 467.29

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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.