Home / 2,190.78-3,288.60-1,266.17

Finding the Fourth Proportional to 2,190.78, 3,288.60 and 1,266.17

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Solution

The fourth proportional to 2,190.78, 3,288.60 and 1,266.17 is: 1,900.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.78 : 3,288.60 = 1,266.17 : x
  2. Step 2: Convert to fraction form
    2,190.78/3,288.60 = 1,266.17/x
  3. Step 3: Cross multiply
    2,190.78x = 3,288.60 × 1,266.17
  4. Step 4: Simplify right side
    2,190.78x = 4,163,910.22
  5. Step 5: Solve for x
    x = 4,163,910.22/2,190.78
  6. Step 6: Final answer
    x = 1,900.65

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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.