Home / 2,811.78-3,880.19-1,552.81

Finding the Fourth Proportional to 2,811.78, 3,880.19 and 1,552.81

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Solution

The fourth proportional to 2,811.78, 3,880.19 and 1,552.81 is: 2,142.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.78 : 3,880.19 = 1,552.81 : x
  2. Step 2: Convert to fraction form
    2,811.78/3,880.19 = 1,552.81/x
  3. Step 3: Cross multiply
    2,811.78x = 3,880.19 × 1,552.81
  4. Step 4: Simplify right side
    2,811.78x = 6,025,197.83
  5. Step 5: Solve for x
    x = 6,025,197.83/2,811.78
  6. Step 6: Final answer
    x = 2,142.84

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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.