Home / 2,215.11-3,321.91-1,118.77

Finding the Fourth Proportional to 2,215.11, 3,321.91 and 1,118.77

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Solution

The fourth proportional to 2,215.11, 3,321.91 and 1,118.77 is: 1,677.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.11 : 3,321.91 = 1,118.77 : x
  2. Step 2: Convert to fraction form
    2,215.11/3,321.91 = 1,118.77/x
  3. Step 3: Cross multiply
    2,215.11x = 3,321.91 × 1,118.77
  4. Step 4: Simplify right side
    2,215.11x = 3,716,453.25
  5. Step 5: Solve for x
    x = 3,716,453.25/2,215.11
  6. Step 6: Final answer
    x = 1,677.77

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1.5x scale

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.