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Finding the Fourth Proportional to 3,083.80, 4,255.14 and 1,904.80

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Solution

The fourth proportional to 3,083.80, 4,255.14 and 1,904.80 is: 2,628.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,083.80 : 4,255.14 = 1,904.80 : x
  2. Step 2: Convert to fraction form
    3,083.80/4,255.14 = 1,904.80/x
  3. Step 3: Cross multiply
    3,083.80x = 4,255.14 × 1,904.80
  4. Step 4: Simplify right side
    3,083.80x = 8,105,190.67
  5. Step 5: Solve for x
    x = 8,105,190.67/3,083.80
  6. Step 6: Final answer
    x = 2,628.31

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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.