Home / 3,479.28-5,215.26-1,286.60

Finding the Fourth Proportional to 3,479.28, 5,215.26 and 1,286.60

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Solution

The fourth proportional to 3,479.28, 5,215.26 and 1,286.60 is: 1,928.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.28 : 5,215.26 = 1,286.60 : x
  2. Step 2: Convert to fraction form
    3,479.28/5,215.26 = 1,286.60/x
  3. Step 3: Cross multiply
    3,479.28x = 5,215.26 × 1,286.60
  4. Step 4: Simplify right side
    3,479.28x = 6,709,953.52
  5. Step 5: Solve for x
    x = 6,709,953.52/3,479.28
  6. Step 6: Final answer
    x = 1,928.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.