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Finding the Fourth Proportional to 2,180, 3,270 and 641

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Solution

The fourth proportional to 2,180, 3,270 and 641 is: 961.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,180 : 3,270 = 641 : x
  2. Step 2: Convert to fraction form
    2,180/3,270 = 641/x
  3. Step 3: Cross multiply
    2,180x = 3,270 × 641
  4. Step 4: Simplify right side
    2,180x = 2,096,070
  5. Step 5: Solve for x
    x = 2,096,070/2,180
  6. Step 6: Final answer
    x = 961.50

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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.