Home / 1,961.43-2,706.80-1,077.21

Finding the Fourth Proportional to 1,961.43, 2,706.80 and 1,077.21

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Solution

The fourth proportional to 1,961.43, 2,706.80 and 1,077.21 is: 1,486.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.43 : 2,706.80 = 1,077.21 : x
  2. Step 2: Convert to fraction form
    1,961.43/2,706.80 = 1,077.21/x
  3. Step 3: Cross multiply
    1,961.43x = 2,706.80 × 1,077.21
  4. Step 4: Simplify right side
    1,961.43x = 2,915,792.03
  5. Step 5: Solve for x
    x = 2,915,792.03/1,961.43
  6. Step 6: Final answer
    x = 1,486.56

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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.