Home / 2,189.10-3,275.44-1,215.88

Finding the Fourth Proportional to 2,189.10, 3,275.44 and 1,215.88

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Solution

The fourth proportional to 2,189.10, 3,275.44 and 1,215.88 is: 1,819.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.10 : 3,275.44 = 1,215.88 : x
  2. Step 2: Convert to fraction form
    2,189.10/3,275.44 = 1,215.88/x
  3. Step 3: Cross multiply
    2,189.10x = 3,275.44 × 1,215.88
  4. Step 4: Simplify right side
    2,189.10x = 3,982,541.99
  5. Step 5: Solve for x
    x = 3,982,541.99/2,189.10
  6. Step 6: Final answer
    x = 1,819.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.