Home / 3,170.75-4,375.89-1,911.80

Finding the Fourth Proportional to 3,170.75, 4,375.89 and 1,911.80

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Solution

The fourth proportional to 3,170.75, 4,375.89 and 1,911.80 is: 2,638.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,170.75 : 4,375.89 = 1,911.80 : x
  2. Step 2: Convert to fraction form
    3,170.75/4,375.89 = 1,911.80/x
  3. Step 3: Cross multiply
    3,170.75x = 4,375.89 × 1,911.80
  4. Step 4: Simplify right side
    3,170.75x = 8,365,837.44
  5. Step 5: Solve for x
    x = 8,365,837.44/3,170.75
  6. Step 6: Final answer
    x = 2,638.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.