Home / 2,216.68-3,059.16-1,221.96

Finding the Fourth Proportional to 2,216.68, 3,059.16 and 1,221.96

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Solution

The fourth proportional to 2,216.68, 3,059.16 and 1,221.96 is: 1,686.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.68 : 3,059.16 = 1,221.96 : x
  2. Step 2: Convert to fraction form
    2,216.68/3,059.16 = 1,221.96/x
  3. Step 3: Cross multiply
    2,216.68x = 3,059.16 × 1,221.96
  4. Step 4: Simplify right side
    2,216.68x = 3,738,160.45
  5. Step 5: Solve for x
    x = 3,738,160.45/2,216.68
  6. Step 6: Final answer
    x = 1,686.38

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1.5x scale

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.