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Finding the Fourth Proportional to 2,603.85, 3,911.22 and 2,213.79

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Solution

The fourth proportional to 2,603.85, 3,911.22 and 2,213.79 is: 3,325.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,603.85 : 3,911.22 = 2,213.79 : x
  2. Step 2: Convert to fraction form
    2,603.85/3,911.22 = 2,213.79/x
  3. Step 3: Cross multiply
    2,603.85x = 3,911.22 × 2,213.79
  4. Step 4: Simplify right side
    2,603.85x = 8,658,619.72
  5. Step 5: Solve for x
    x = 8,658,619.72/2,603.85
  6. Step 6: Final answer
    x = 3,325.31

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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.