Home / 2,215.45-3,057.30-1,220.71

Finding the Fourth Proportional to 2,215.45, 3,057.30 and 1,220.71

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Solution

The fourth proportional to 2,215.45, 3,057.30 and 1,220.71 is: 1,684.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.45 : 3,057.30 = 1,220.71 : x
  2. Step 2: Convert to fraction form
    2,215.45/3,057.30 = 1,220.71/x
  3. Step 3: Cross multiply
    2,215.45x = 3,057.30 × 1,220.71
  4. Step 4: Simplify right side
    2,215.45x = 3,732,076.68
  5. Step 5: Solve for x
    x = 3,732,076.68/2,215.45
  6. Step 6: Final answer
    x = 1,684.57

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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.