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Finding the Fourth Proportional to 2,768.80, 3,821.36 and 1,649.84

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Solution

The fourth proportional to 2,768.80, 3,821.36 and 1,649.84 is: 2,277.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.80 : 3,821.36 = 1,649.84 : x
  2. Step 2: Convert to fraction form
    2,768.80/3,821.36 = 1,649.84/x
  3. Step 3: Cross multiply
    2,768.80x = 3,821.36 × 1,649.84
  4. Step 4: Simplify right side
    2,768.80x = 6,304,632.58
  5. Step 5: Solve for x
    x = 6,304,632.58/2,768.80
  6. Step 6: Final answer
    x = 2,277.03

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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.