Home / 2,185.49-3,015.11-1,439.81

Finding the Fourth Proportional to 2,185.49, 3,015.11 and 1,439.81

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Solution

The fourth proportional to 2,185.49, 3,015.11 and 1,439.81 is: 1,986.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.49 : 3,015.11 = 1,439.81 : x
  2. Step 2: Convert to fraction form
    2,185.49/3,015.11 = 1,439.81/x
  3. Step 3: Cross multiply
    2,185.49x = 3,015.11 × 1,439.81
  4. Step 4: Simplify right side
    2,185.49x = 4,341,163.25
  5. Step 5: Solve for x
    x = 4,341,163.25/2,185.49
  6. Step 6: Final answer
    x = 1,986.36

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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.