Home / 2,185.50-3,015.14-1,439.85

Finding the Fourth Proportional to 2,185.50, 3,015.14 and 1,439.85

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Solution

The fourth proportional to 2,185.50, 3,015.14 and 1,439.85 is: 1,986.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.50 : 3,015.14 = 1,439.85 : x
  2. Step 2: Convert to fraction form
    2,185.50/3,015.14 = 1,439.85/x
  3. Step 3: Cross multiply
    2,185.50x = 3,015.14 × 1,439.85
  4. Step 4: Simplify right side
    2,185.50x = 4,341,342.13
  5. Step 5: Solve for x
    x = 4,341,342.13/2,185.50
  6. Step 6: Final answer
    x = 1,986.43

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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.