Home / 2,115.27-2,919.11-1,231.06

Finding the Fourth Proportional to 2,115.27, 2,919.11 and 1,231.06

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Solution

The fourth proportional to 2,115.27, 2,919.11 and 1,231.06 is: 1,698.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.27 : 2,919.11 = 1,231.06 : x
  2. Step 2: Convert to fraction form
    2,115.27/2,919.11 = 1,231.06/x
  3. Step 3: Cross multiply
    2,115.27x = 2,919.11 × 1,231.06
  4. Step 4: Simplify right side
    2,115.27x = 3,593,595.34
  5. Step 5: Solve for x
    x = 3,593,595.34/2,115.27
  6. Step 6: Final answer
    x = 1,698.88

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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.