Home / 3,138.68-4,703.94-1,287.60

Finding the Fourth Proportional to 3,138.68, 4,703.94 and 1,287.60

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Solution

The fourth proportional to 3,138.68, 4,703.94 and 1,287.60 is: 1,929.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.68 : 4,703.94 = 1,287.60 : x
  2. Step 2: Convert to fraction form
    3,138.68/4,703.94 = 1,287.60/x
  3. Step 3: Cross multiply
    3,138.68x = 4,703.94 × 1,287.60
  4. Step 4: Simplify right side
    3,138.68x = 6,056,793.14
  5. Step 5: Solve for x
    x = 6,056,793.14/3,138.68
  6. Step 6: Final answer
    x = 1,929.73

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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.