Home / 2,790.25-4,185.68-1,145.85

Finding the Fourth Proportional to 2,790.25, 4,185.68 and 1,145.85

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Solution

The fourth proportional to 2,790.25, 4,185.68 and 1,145.85 is: 1,718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.25 : 4,185.68 = 1,145.85 : x
  2. Step 2: Convert to fraction form
    2,790.25/4,185.68 = 1,145.85/x
  3. Step 3: Cross multiply
    2,790.25x = 4,185.68 × 1,145.85
  4. Step 4: Simplify right side
    2,790.25x = 4,796,140.00
  5. Step 5: Solve for x
    x = 4,796,140.00/2,790.25
  6. Step 6: Final answer
    x = 1,718.89

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1.5x scale

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.