Home / 2,831.81-3,904.47-1,769.22

Finding the Fourth Proportional to 2,831.81, 3,904.47 and 1,769.22

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Solution

The fourth proportional to 2,831.81, 3,904.47 and 1,769.22 is: 2,439.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.81 : 3,904.47 = 1,769.22 : x
  2. Step 2: Convert to fraction form
    2,831.81/3,904.47 = 1,769.22/x
  3. Step 3: Cross multiply
    2,831.81x = 3,904.47 × 1,769.22
  4. Step 4: Simplify right side
    2,831.81x = 6,907,866.41
  5. Step 5: Solve for x
    x = 6,907,866.41/2,831.81
  6. Step 6: Final answer
    x = 2,439.39

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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.