Home / 2,164.26-2,986.68-1,220.06

Finding the Fourth Proportional to 2,164.26, 2,986.68 and 1,220.06

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Solution

The fourth proportional to 2,164.26, 2,986.68 and 1,220.06 is: 1,683.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.26 : 2,986.68 = 1,220.06 : x
  2. Step 2: Convert to fraction form
    2,164.26/2,986.68 = 1,220.06/x
  3. Step 3: Cross multiply
    2,164.26x = 2,986.68 × 1,220.06
  4. Step 4: Simplify right side
    2,164.26x = 3,643,928.80
  5. Step 5: Solve for x
    x = 3,643,928.80/2,164.26
  6. Step 6: Final answer
    x = 1,683.68

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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.