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Finding the Fourth Proportional to 3,286.75, 4,928.64 and 946.22

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Solution

The fourth proportional to 3,286.75, 4,928.64 and 946.22 is: 1,418.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,286.75 : 4,928.64 = 946.22 : x
  2. Step 2: Convert to fraction form
    3,286.75/4,928.64 = 946.22/x
  3. Step 3: Cross multiply
    3,286.75x = 4,928.64 × 946.22
  4. Step 4: Simplify right side
    3,286.75x = 4,663,577.74
  5. Step 5: Solve for x
    x = 4,663,577.74/3,286.75
  6. Step 6: Final answer
    x = 1,418.90

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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.