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Finding the Fourth Proportional to 3,163.94, 4,368.28 and 2,831.80

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Solution

The fourth proportional to 3,163.94, 4,368.28 and 2,831.80 is: 3,909.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,163.94 : 4,368.28 = 2,831.80 : x
  2. Step 2: Convert to fraction form
    3,163.94/4,368.28 = 2,831.80/x
  3. Step 3: Cross multiply
    3,163.94x = 4,368.28 × 2,831.80
  4. Step 4: Simplify right side
    3,163.94x = 12,370,095.30
  5. Step 5: Solve for x
    x = 12,370,095.30/3,163.94
  6. Step 6: Final answer
    x = 3,909.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.