Home / 2,831.88-4,228.73-2,312.90

Finding the Fourth Proportional to 2,831.88, 4,228.73 and 2,312.90

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Solution

The fourth proportional to 2,831.88, 4,228.73 and 2,312.90 is: 3,453.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.88 : 4,228.73 = 2,312.90 : x
  2. Step 2: Convert to fraction form
    2,831.88/4,228.73 = 2,312.90/x
  3. Step 3: Cross multiply
    2,831.88x = 4,228.73 × 2,312.90
  4. Step 4: Simplify right side
    2,831.88x = 9,780,629.62
  5. Step 5: Solve for x
    x = 9,780,629.62/2,831.88
  6. Step 6: Final answer
    x = 3,453.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.