Home / 1,939.21-2,911.55-1,851.73

Finding the Fourth Proportional to 1,939.21, 2,911.55 and 1,851.73

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Solution

The fourth proportional to 1,939.21, 2,911.55 and 1,851.73 is: 2,780.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.21 : 2,911.55 = 1,851.73 : x
  2. Step 2: Convert to fraction form
    1,939.21/2,911.55 = 1,851.73/x
  3. Step 3: Cross multiply
    1,939.21x = 2,911.55 × 1,851.73
  4. Step 4: Simplify right side
    1,939.21x = 5,391,387.94
  5. Step 5: Solve for x
    x = 5,391,387.94/1,939.21
  6. Step 6: Final answer
    x = 2,780.20

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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.