Home / 3,219.68-4,439.40-2,986.40

Finding the Fourth Proportional to 3,219.68, 4,439.40 and 2,986.40

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Solution

The fourth proportional to 3,219.68, 4,439.40 and 2,986.40 is: 4,117.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.68 : 4,439.40 = 2,986.40 : x
  2. Step 2: Convert to fraction form
    3,219.68/4,439.40 = 2,986.40/x
  3. Step 3: Cross multiply
    3,219.68x = 4,439.40 × 2,986.40
  4. Step 4: Simplify right side
    3,219.68x = 13,257,824.16
  5. Step 5: Solve for x
    x = 13,257,824.16/3,219.68
  6. Step 6: Final answer
    x = 4,117.75

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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.