Home / 2,831.21-4,242.48-1,186.86

Finding the Fourth Proportional to 2,831.21, 4,242.48 and 1,186.86

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Solution

The fourth proportional to 2,831.21, 4,242.48 and 1,186.86 is: 1,778.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.21 : 4,242.48 = 1,186.86 : x
  2. Step 2: Convert to fraction form
    2,831.21/4,242.48 = 1,186.86/x
  3. Step 3: Cross multiply
    2,831.21x = 4,242.48 × 1,186.86
  4. Step 4: Simplify right side
    2,831.21x = 5,035,224.08
  5. Step 5: Solve for x
    x = 5,035,224.08/2,831.21
  6. Step 6: Final answer
    x = 1,778.47

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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.