Home / 3,286.68-4,929.66-978.36

Finding the Fourth Proportional to 3,286.68, 4,929.66 and 978.36

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Solution

The fourth proportional to 3,286.68, 4,929.66 and 978.36 is: 1,467.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,286.68 : 4,929.66 = 978.36 : x
  2. Step 2: Convert to fraction form
    3,286.68/4,929.66 = 978.36/x
  3. Step 3: Cross multiply
    3,286.68x = 4,929.66 × 978.36
  4. Step 4: Simplify right side
    3,286.68x = 4,822,982.16
  5. Step 5: Solve for x
    x = 4,822,982.16/3,286.68
  6. Step 6: Final answer
    x = 1,467.43

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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.