Home / 2,164.20-2,986.55-1,219.99

Finding the Fourth Proportional to 2,164.20, 2,986.55 and 1,219.99

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Solution

The fourth proportional to 2,164.20, 2,986.55 and 1,219.99 is: 1,683.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.20 : 2,986.55 = 1,219.99 : x
  2. Step 2: Convert to fraction form
    2,164.20/2,986.55 = 1,219.99/x
  3. Step 3: Cross multiply
    2,164.20x = 2,986.55 × 1,219.99
  4. Step 4: Simplify right side
    2,164.20x = 3,643,561.13
  5. Step 5: Solve for x
    x = 3,643,561.13/2,164.20
  6. Step 6: Final answer
    x = 1,683.56

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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.