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Finding the Fourth Proportional to 2,114.63, 3,171.94 and 1,986.18

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Solution

The fourth proportional to 2,114.63, 3,171.94 and 1,986.18 is: 2,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.63 : 3,171.94 = 1,986.18 : x
  2. Step 2: Convert to fraction form
    2,114.63/3,171.94 = 1,986.18/x
  3. Step 3: Cross multiply
    2,114.63x = 3,171.94 × 1,986.18
  4. Step 4: Simplify right side
    2,114.63x = 6,300,027.93
  5. Step 5: Solve for x
    x = 6,300,027.93/2,114.63
  6. Step 6: Final answer
    x = 2,979.26

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Similar ratio
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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.