Home / 2,138.19-3,200.59-1,620.19

Finding the Fourth Proportional to 2,138.19, 3,200.59 and 1,620.19

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Solution

The fourth proportional to 2,138.19, 3,200.59 and 1,620.19 is: 2,425.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.19 : 3,200.59 = 1,620.19 : x
  2. Step 2: Convert to fraction form
    2,138.19/3,200.59 = 1,620.19/x
  3. Step 3: Cross multiply
    2,138.19x = 3,200.59 × 1,620.19
  4. Step 4: Simplify right side
    2,138.19x = 5,185,563.91
  5. Step 5: Solve for x
    x = 5,185,563.91/2,138.19
  6. Step 6: Final answer
    x = 2,425.21

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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.