Home / 2,215.52-3,057.55-1,220.87

Finding the Fourth Proportional to 2,215.52, 3,057.55 and 1,220.87

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Solution

The fourth proportional to 2,215.52, 3,057.55 and 1,220.87 is: 1,684.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.52 : 3,057.55 = 1,220.87 : x
  2. Step 2: Convert to fraction form
    2,215.52/3,057.55 = 1,220.87/x
  3. Step 3: Cross multiply
    2,215.52x = 3,057.55 × 1,220.87
  4. Step 4: Simplify right side
    2,215.52x = 3,732,875.66
  5. Step 5: Solve for x
    x = 3,732,875.66/2,215.52
  6. Step 6: Final answer
    x = 1,684.88

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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.