Home / 3,889.20-5,831.90-1,291.26

Finding the Fourth Proportional to 3,889.20, 5,831.90 and 1,291.26

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Solution

The fourth proportional to 3,889.20, 5,831.90 and 1,291.26 is: 1,936.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.20 : 5,831.90 = 1,291.26 : x
  2. Step 2: Convert to fraction form
    3,889.20/5,831.90 = 1,291.26/x
  3. Step 3: Cross multiply
    3,889.20x = 5,831.90 × 1,291.26
  4. Step 4: Simplify right side
    3,889.20x = 7,530,499.19
  5. Step 5: Solve for x
    x = 7,530,499.19/3,889.20
  6. Step 6: Final answer
    x = 1,936.26

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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.