Home / 2,986.80-4,121.71-1,660.42

Finding the Fourth Proportional to 2,986.80, 4,121.71 and 1,660.42

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Solution

The fourth proportional to 2,986.80, 4,121.71 and 1,660.42 is: 2,291.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.80 : 4,121.71 = 1,660.42 : x
  2. Step 2: Convert to fraction form
    2,986.80/4,121.71 = 1,660.42/x
  3. Step 3: Cross multiply
    2,986.80x = 4,121.71 × 1,660.42
  4. Step 4: Simplify right side
    2,986.80x = 6,843,769.72
  5. Step 5: Solve for x
    x = 6,843,769.72/2,986.80
  6. Step 6: Final answer
    x = 2,291.34

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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.