Home / 2,831.20-4,247.44-1,186.88

Finding the Fourth Proportional to 2,831.20, 4,247.44 and 1,186.88

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Solution

The fourth proportional to 2,831.20, 4,247.44 and 1,186.88 is: 1,780.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.20 : 4,247.44 = 1,186.88 : x
  2. Step 2: Convert to fraction form
    2,831.20/4,247.44 = 1,186.88/x
  3. Step 3: Cross multiply
    2,831.20x = 4,247.44 × 1,186.88
  4. Step 4: Simplify right side
    2,831.20x = 5,041,201.59
  5. Step 5: Solve for x
    x = 5,041,201.59/2,831.20
  6. Step 6: Final answer
    x = 1,780.59

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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.