Home / 1,890.20-2,608.00-1,226.97

Finding the Fourth Proportional to 1,890.20, 2,608.00 and 1,226.97

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Solution

The fourth proportional to 1,890.20, 2,608.00 and 1,226.97 is: 1,692.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.20 : 2,608.00 = 1,226.97 : x
  2. Step 2: Convert to fraction form
    1,890.20/2,608.00 = 1,226.97/x
  3. Step 3: Cross multiply
    1,890.20x = 2,608.00 × 1,226.97
  4. Step 4: Simplify right side
    1,890.20x = 3,199,934.69
  5. Step 5: Solve for x
    x = 3,199,934.69/1,890.20
  6. Step 6: Final answer
    x = 1,692.91

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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.