Home / 2,790.87-4,186.91-1,328.01

Finding the Fourth Proportional to 2,790.87, 4,186.91 and 1,328.01

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Solution

The fourth proportional to 2,790.87, 4,186.91 and 1,328.01 is: 1,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.87 : 4,186.91 = 1,328.01 : x
  2. Step 2: Convert to fraction form
    2,790.87/4,186.91 = 1,328.01/x
  3. Step 3: Cross multiply
    2,790.87x = 4,186.91 × 1,328.01
  4. Step 4: Simplify right side
    2,790.87x = 5,560,258.35
  5. Step 5: Solve for x
    x = 5,560,258.35/2,790.87
  6. Step 6: Final answer
    x = 1,992.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.