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Finding the Fourth Proportional to 722.70, 1,084.14 and 311.67

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Solution

The fourth proportional to 722.70, 1,084.14 and 311.67 is: 467.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.70 : 1,084.14 = 311.67 : x
  2. Step 2: Convert to fraction form
    722.70/1,084.14 = 311.67/x
  3. Step 3: Cross multiply
    722.70x = 1,084.14 × 311.67
  4. Step 4: Simplify right side
    722.70x = 337,893.91
  5. Step 5: Solve for x
    x = 337,893.91/722.70
  6. Step 6: Final answer
    x = 467.54

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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.