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Finding the Fourth Proportional to 2,039.80, 3,058.80 and 806.80

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Solution

The fourth proportional to 2,039.80, 3,058.80 and 806.80 is: 1,209.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.80 : 3,058.80 = 806.80 : x
  2. Step 2: Convert to fraction form
    2,039.80/3,058.80 = 806.80/x
  3. Step 3: Cross multiply
    2,039.80x = 3,058.80 × 806.80
  4. Step 4: Simplify right side
    2,039.80x = 2,467,839.84
  5. Step 5: Solve for x
    x = 2,467,839.84/2,039.80
  6. Step 6: Final answer
    x = 1,209.84

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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.