Home / 2,216.15-3,317.78-1,288.88

Finding the Fourth Proportional to 2,216.15, 3,317.78 and 1,288.88

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Solution

The fourth proportional to 2,216.15, 3,317.78 and 1,288.88 is: 1,929.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.15 : 3,317.78 = 1,288.88 : x
  2. Step 2: Convert to fraction form
    2,216.15/3,317.78 = 1,288.88/x
  3. Step 3: Cross multiply
    2,216.15x = 3,317.78 × 1,288.88
  4. Step 4: Simplify right side
    2,216.15x = 4,276,197.25
  5. Step 5: Solve for x
    x = 4,276,197.25/2,216.15
  6. Step 6: Final answer
    x = 1,929.57

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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.