Home / 1,986.97-2,744.01-1,288.75

Finding the Fourth Proportional to 1,986.97, 2,744.01 and 1,288.75

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Solution

The fourth proportional to 1,986.97, 2,744.01 and 1,288.75 is: 1,779.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.97 : 2,744.01 = 1,288.75 : x
  2. Step 2: Convert to fraction form
    1,986.97/2,744.01 = 1,288.75/x
  3. Step 3: Cross multiply
    1,986.97x = 2,744.01 × 1,288.75
  4. Step 4: Simplify right side
    1,986.97x = 3,536,342.89
  5. Step 5: Solve for x
    x = 3,536,342.89/1,986.97
  6. Step 6: Final answer
    x = 1,779.77

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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.