Home / 2,209.79-3,049.44-1,215.09

Finding the Fourth Proportional to 2,209.79, 3,049.44 and 1,215.09

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Solution

The fourth proportional to 2,209.79, 3,049.44 and 1,215.09 is: 1,676.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.79 : 3,049.44 = 1,215.09 : x
  2. Step 2: Convert to fraction form
    2,209.79/3,049.44 = 1,215.09/x
  3. Step 3: Cross multiply
    2,209.79x = 3,049.44 × 1,215.09
  4. Step 4: Simplify right side
    2,209.79x = 3,705,344.05
  5. Step 5: Solve for x
    x = 3,705,344.05/2,209.79
  6. Step 6: Final answer
    x = 1,676.79

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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.