Home / 3,138.26-4,707.30-1,288.86

Finding the Fourth Proportional to 3,138.26, 4,707.30 and 1,288.86

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Solution

The fourth proportional to 3,138.26, 4,707.30 and 1,288.86 is: 1,933.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.26 : 4,707.30 = 1,288.86 : x
  2. Step 2: Convert to fraction form
    3,138.26/4,707.30 = 1,288.86/x
  3. Step 3: Cross multiply
    3,138.26x = 4,707.30 × 1,288.86
  4. Step 4: Simplify right side
    3,138.26x = 6,067,050.68
  5. Step 5: Solve for x
    x = 6,067,050.68/3,138.26
  6. Step 6: Final answer
    x = 1,933.25

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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.