Home / 2,120.61-2,926.44-1,189.11

Finding the Fourth Proportional to 2,120.61, 2,926.44 and 1,189.11

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Solution

The fourth proportional to 2,120.61, 2,926.44 and 1,189.11 is: 1,640.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.61 : 2,926.44 = 1,189.11 : x
  2. Step 2: Convert to fraction form
    2,120.61/2,926.44 = 1,189.11/x
  3. Step 3: Cross multiply
    2,120.61x = 2,926.44 × 1,189.11
  4. Step 4: Simplify right side
    2,120.61x = 3,479,859.07
  5. Step 5: Solve for x
    x = 3,479,859.07/2,120.61
  6. Step 6: Final answer
    x = 1,640.97

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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.