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Finding the Fourth Proportional to 6,287.28, 8,668.44 and 3,928.56

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Solution

The fourth proportional to 6,287.28, 8,668.44 and 3,928.56 is: 5,416.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,287.28 : 8,668.44 = 3,928.56 : x
  2. Step 2: Convert to fraction form
    6,287.28/8,668.44 = 3,928.56/x
  3. Step 3: Cross multiply
    6,287.28x = 8,668.44 × 3,928.56
  4. Step 4: Simplify right side
    6,287.28x = 34,054,486.65
  5. Step 5: Solve for x
    x = 34,054,486.65/6,287.28
  6. Step 6: Final answer
    x = 5,416.41

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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.