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Finding the Fourth Proportional to 1,987.97, 2,741.72 and 1,960.63

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Solution

The fourth proportional to 1,987.97, 2,741.72 and 1,960.63 is: 2,704.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.97 : 2,741.72 = 1,960.63 : x
  2. Step 2: Convert to fraction form
    1,987.97/2,741.72 = 1,960.63/x
  3. Step 3: Cross multiply
    1,987.97x = 2,741.72 × 1,960.63
  4. Step 4: Simplify right side
    1,987.97x = 5,375,481.83
  5. Step 5: Solve for x
    x = 5,375,481.83/1,987.97
  6. Step 6: Final answer
    x = 2,704.01

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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.