Home / 1,986.58-2,979.87-1,368.43

Finding the Fourth Proportional to 1,986.58, 2,979.87 and 1,368.43

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Solution

The fourth proportional to 1,986.58, 2,979.87 and 1,368.43 is: 2,052.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.58 : 2,979.87 = 1,368.43 : x
  2. Step 2: Convert to fraction form
    1,986.58/2,979.87 = 1,368.43/x
  3. Step 3: Cross multiply
    1,986.58x = 2,979.87 × 1,368.43
  4. Step 4: Simplify right side
    1,986.58x = 4,077,743.50
  5. Step 5: Solve for x
    x = 4,077,743.50/1,986.58
  6. Step 6: Final answer
    x = 2,052.65

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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.