Home / 2,215.52-3,057.38-1,220.80

Finding the Fourth Proportional to 2,215.52, 3,057.38 and 1,220.80

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Solution

The fourth proportional to 2,215.52, 3,057.38 and 1,220.80 is: 1,684.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.52 : 3,057.38 = 1,220.80 : x
  2. Step 2: Convert to fraction form
    2,215.52/3,057.38 = 1,220.80/x
  3. Step 3: Cross multiply
    2,215.52x = 3,057.38 × 1,220.80
  4. Step 4: Simplify right side
    2,215.52x = 3,732,449.50
  5. Step 5: Solve for x
    x = 3,732,449.50/2,215.52
  6. Step 6: Final answer
    x = 1,684.68

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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.