Home / 2,811.60-3,880-1,633.36

Finding the Fourth Proportional to 2,811.60, 3,880 and 1,633.36

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Solution

The fourth proportional to 2,811.60, 3,880 and 1,633.36 is: 2,254.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.60 : 3,880 = 1,633.36 : x
  2. Step 2: Convert to fraction form
    2,811.60/3,880 = 1,633.36/x
  3. Step 3: Cross multiply
    2,811.60x = 3,880 × 1,633.36
  4. Step 4: Simplify right side
    2,811.60x = 6,337,436.80
  5. Step 5: Solve for x
    x = 6,337,436.80/2,811.60
  6. Step 6: Final answer
    x = 2,254.03

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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.