Home / 2,015.21-2,780.97-1,131.01

Finding the Fourth Proportional to 2,015.21, 2,780.97 and 1,131.01

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Solution

The fourth proportional to 2,015.21, 2,780.97 and 1,131.01 is: 1,560.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.21 : 2,780.97 = 1,131.01 : x
  2. Step 2: Convert to fraction form
    2,015.21/2,780.97 = 1,131.01/x
  3. Step 3: Cross multiply
    2,015.21x = 2,780.97 × 1,131.01
  4. Step 4: Simplify right side
    2,015.21x = 3,145,304.88
  5. Step 5: Solve for x
    x = 3,145,304.88/2,015.21
  6. Step 6: Final answer
    x = 1,560.78

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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.