Home / 2,115.17-3,174.78-1,191.77

Finding the Fourth Proportional to 2,115.17, 3,174.78 and 1,191.77

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Solution

The fourth proportional to 2,115.17, 3,174.78 and 1,191.77 is: 1,788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.17 : 3,174.78 = 1,191.77 : x
  2. Step 2: Convert to fraction form
    2,115.17/3,174.78 = 1,191.77/x
  3. Step 3: Cross multiply
    2,115.17x = 3,174.78 × 1,191.77
  4. Step 4: Simplify right side
    2,115.17x = 3,783,607.56
  5. Step 5: Solve for x
    x = 3,783,607.56/2,115.17
  6. Step 6: Final answer
    x = 1,788.80

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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.