Home / 2,986.09-4,120.80-1,659.79

Finding the Fourth Proportional to 2,986.09, 4,120.80 and 1,659.79

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Solution

The fourth proportional to 2,986.09, 4,120.80 and 1,659.79 is: 2,290.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.09 : 4,120.80 = 1,659.79 : x
  2. Step 2: Convert to fraction form
    2,986.09/4,120.80 = 1,659.79/x
  3. Step 3: Cross multiply
    2,986.09x = 4,120.80 × 1,659.79
  4. Step 4: Simplify right side
    2,986.09x = 6,839,675.51
  5. Step 5: Solve for x
    x = 6,839,675.51/2,986.09
  6. Step 6: Final answer
    x = 2,290.51

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1.5x scale

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.