Home / 2,122.58-3,200.14-1,979.64

Finding the Fourth Proportional to 2,122.58, 3,200.14 and 1,979.64

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Solution

The fourth proportional to 2,122.58, 3,200.14 and 1,979.64 is: 2,984.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.58 : 3,200.14 = 1,979.64 : x
  2. Step 2: Convert to fraction form
    2,122.58/3,200.14 = 1,979.64/x
  3. Step 3: Cross multiply
    2,122.58x = 3,200.14 × 1,979.64
  4. Step 4: Simplify right side
    2,122.58x = 6,335,125.15
  5. Step 5: Solve for x
    x = 6,335,125.15/2,122.58
  6. Step 6: Final answer
    x = 2,984.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.