Home / 2,163.95-2,986.23-1,219.79

Finding the Fourth Proportional to 2,163.95, 2,986.23 and 1,219.79

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Solution

The fourth proportional to 2,163.95, 2,986.23 and 1,219.79 is: 1,683.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.95 : 2,986.23 = 1,219.79 : x
  2. Step 2: Convert to fraction form
    2,163.95/2,986.23 = 1,219.79/x
  3. Step 3: Cross multiply
    2,163.95x = 2,986.23 × 1,219.79
  4. Step 4: Simplify right side
    2,163.95x = 3,642,585.53
  5. Step 5: Solve for x
    x = 3,642,585.53/2,163.95
  6. Step 6: Final answer
    x = 1,683.30

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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.