Home / 1,911.06-2,635.20-1,247.94

Finding the Fourth Proportional to 1,911.06, 2,635.20 and 1,247.94

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Solution

The fourth proportional to 1,911.06, 2,635.20 and 1,247.94 is: 1,720.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.06 : 2,635.20 = 1,247.94 : x
  2. Step 2: Convert to fraction form
    1,911.06/2,635.20 = 1,247.94/x
  3. Step 3: Cross multiply
    1,911.06x = 2,635.20 × 1,247.94
  4. Step 4: Simplify right side
    1,911.06x = 3,288,571.49
  5. Step 5: Solve for x
    x = 3,288,571.49/1,911.06
  6. Step 6: Final answer
    x = 1,720.81

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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.