Home / 2,215.77-3,057.65-1,221.09

Finding the Fourth Proportional to 2,215.77, 3,057.65 and 1,221.09

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Solution

The fourth proportional to 2,215.77, 3,057.65 and 1,221.09 is: 1,685.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.77 : 3,057.65 = 1,221.09 : x
  2. Step 2: Convert to fraction form
    2,215.77/3,057.65 = 1,221.09/x
  3. Step 3: Cross multiply
    2,215.77x = 3,057.65 × 1,221.09
  4. Step 4: Simplify right side
    2,215.77x = 3,733,665.84
  5. Step 5: Solve for x
    x = 3,733,665.84/2,215.77
  6. Step 6: Final answer
    x = 1,685.04

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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.