Home / 2,118.70-3,180.45-1,144.30

Finding the Fourth Proportional to 2,118.70, 3,180.45 and 1,144.30

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Solution

The fourth proportional to 2,118.70, 3,180.45 and 1,144.30 is: 1,717.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.70 : 3,180.45 = 1,144.30 : x
  2. Step 2: Convert to fraction form
    2,118.70/3,180.45 = 1,144.30/x
  3. Step 3: Cross multiply
    2,118.70x = 3,180.45 × 1,144.30
  4. Step 4: Simplify right side
    2,118.70x = 3,639,388.94
  5. Step 5: Solve for x
    x = 3,639,388.94/2,118.70
  6. Step 6: Final answer
    x = 1,717.75

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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.