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Finding the Fourth Proportional to 2,739.88, 4,128.12 and 2,480.21

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Solution

The fourth proportional to 2,739.88, 4,128.12 and 2,480.21 is: 3,736.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.88 : 4,128.12 = 2,480.21 : x
  2. Step 2: Convert to fraction form
    2,739.88/4,128.12 = 2,480.21/x
  3. Step 3: Cross multiply
    2,739.88x = 4,128.12 × 2,480.21
  4. Step 4: Simplify right side
    2,739.88x = 10,238,604.51
  5. Step 5: Solve for x
    x = 10,238,604.51/2,739.88
  6. Step 6: Final answer
    x = 3,736.88

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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.