Home / 2,003.80-2,765.38-1,217.88

Finding the Fourth Proportional to 2,003.80, 2,765.38 and 1,217.88

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Solution

The fourth proportional to 2,003.80, 2,765.38 and 1,217.88 is: 1,680.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,003.80 : 2,765.38 = 1,217.88 : x
  2. Step 2: Convert to fraction form
    2,003.80/2,765.38 = 1,217.88/x
  3. Step 3: Cross multiply
    2,003.80x = 2,765.38 × 1,217.88
  4. Step 4: Simplify right side
    2,003.80x = 3,367,900.99
  5. Step 5: Solve for x
    x = 3,367,900.99/2,003.80
  6. Step 6: Final answer
    x = 1,680.76

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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.