Home / 2,728.35-4,093.13-780.57

Finding the Fourth Proportional to 2,728.35, 4,093.13 and 780.57

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Solution

The fourth proportional to 2,728.35, 4,093.13 and 780.57 is: 1,171.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.35 : 4,093.13 = 780.57 : x
  2. Step 2: Convert to fraction form
    2,728.35/4,093.13 = 780.57/x
  3. Step 3: Cross multiply
    2,728.35x = 4,093.13 × 780.57
  4. Step 4: Simplify right side
    2,728.35x = 3,194,974.48
  5. Step 5: Solve for x
    x = 3,194,974.48/2,728.35
  6. Step 6: Final answer
    x = 1,171.03

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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.