Home / 2,790.82-3,855.12-2,235.28

Finding the Fourth Proportional to 2,790.82, 3,855.12 and 2,235.28

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Solution

The fourth proportional to 2,790.82, 3,855.12 and 2,235.28 is: 3,087.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.82 : 3,855.12 = 2,235.28 : x
  2. Step 2: Convert to fraction form
    2,790.82/3,855.12 = 2,235.28/x
  3. Step 3: Cross multiply
    2,790.82x = 3,855.12 × 2,235.28
  4. Step 4: Simplify right side
    2,790.82x = 8,617,272.63
  5. Step 5: Solve for x
    x = 8,617,272.63/2,790.82
  6. Step 6: Final answer
    x = 3,087.72

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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.