Home / 1,874.44-2,811.21-780.03

Finding the Fourth Proportional to 1,874.44, 2,811.21 and 780.03

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Solution

The fourth proportional to 1,874.44, 2,811.21 and 780.03 is: 1,169.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,874.44 : 2,811.21 = 780.03 : x
  2. Step 2: Convert to fraction form
    1,874.44/2,811.21 = 780.03/x
  3. Step 3: Cross multiply
    1,874.44x = 2,811.21 × 780.03
  4. Step 4: Simplify right side
    1,874.44x = 2,192,825.21
  5. Step 5: Solve for x
    x = 2,192,825.21/1,874.44
  6. Step 6: Final answer
    x = 1,169.86

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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.