Home / 2,120.86-2,926.11-1,189.18

Finding the Fourth Proportional to 2,120.86, 2,926.11 and 1,189.18

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Solution

The fourth proportional to 2,120.86, 2,926.11 and 1,189.18 is: 1,640.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.86 : 2,926.11 = 1,189.18 : x
  2. Step 2: Convert to fraction form
    2,120.86/2,926.11 = 1,189.18/x
  3. Step 3: Cross multiply
    2,120.86x = 2,926.11 × 1,189.18
  4. Step 4: Simplify right side
    2,120.86x = 3,479,671.49
  5. Step 5: Solve for x
    x = 3,479,671.49/2,120.86
  6. Step 6: Final answer
    x = 1,640.69

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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.