Home / 2,811.09-3,880.07-1,631.92

Finding the Fourth Proportional to 2,811.09, 3,880.07 and 1,631.92

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Solution

The fourth proportional to 2,811.09, 3,880.07 and 1,631.92 is: 2,252.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.09 : 3,880.07 = 1,631.92 : x
  2. Step 2: Convert to fraction form
    2,811.09/3,880.07 = 1,631.92/x
  3. Step 3: Cross multiply
    2,811.09x = 3,880.07 × 1,631.92
  4. Step 4: Simplify right side
    2,811.09x = 6,331,963.83
  5. Step 5: Solve for x
    x = 6,331,963.83/2,811.09
  6. Step 6: Final answer
    x = 2,252.49

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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.