Home / 2,087.20-2,894.68-1,991.20

Finding the Fourth Proportional to 2,087.20, 2,894.68 and 1,991.20

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Solution

The fourth proportional to 2,087.20, 2,894.68 and 1,991.20 is: 2,761.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.20 : 2,894.68 = 1,991.20 : x
  2. Step 2: Convert to fraction form
    2,087.20/2,894.68 = 1,991.20/x
  3. Step 3: Cross multiply
    2,087.20x = 2,894.68 × 1,991.20
  4. Step 4: Simplify right side
    2,087.20x = 5,763,886.82
  5. Step 5: Solve for x
    x = 5,763,886.82/2,087.20
  6. Step 6: Final answer
    x = 2,761.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.