Home / 2,207.21-3,311.42-747.38

Finding the Fourth Proportional to 2,207.21, 3,311.42 and 747.38

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Solution

The fourth proportional to 2,207.21, 3,311.42 and 747.38 is: 1,121.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,207.21 : 3,311.42 = 747.38 : x
  2. Step 2: Convert to fraction form
    2,207.21/3,311.42 = 747.38/x
  3. Step 3: Cross multiply
    2,207.21x = 3,311.42 × 747.38
  4. Step 4: Simplify right side
    2,207.21x = 2,474,893.62
  5. Step 5: Solve for x
    x = 2,474,893.62/2,207.21
  6. Step 6: Final answer
    x = 1,121.28

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1.5x scale

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.