Home / 2,215.70-3,057.60-1,221.00

Finding the Fourth Proportional to 2,215.70, 3,057.60 and 1,221.00

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Solution

The fourth proportional to 2,215.70, 3,057.60 and 1,221.00 is: 1,684.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.70 : 3,057.60 = 1,221.00 : x
  2. Step 2: Convert to fraction form
    2,215.70/3,057.60 = 1,221.00/x
  3. Step 3: Cross multiply
    2,215.70x = 3,057.60 × 1,221.00
  4. Step 4: Simplify right side
    2,215.70x = 3,733,324.44
  5. Step 5: Solve for x
    x = 3,733,324.44/2,215.70
  6. Step 6: Final answer
    x = 1,684.94

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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.