Home / 2,158.11-3,231.23-1,115.91

Finding the Fourth Proportional to 2,158.11, 3,231.23 and 1,115.91

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Solution

The fourth proportional to 2,158.11, 3,231.23 and 1,115.91 is: 1,670.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.11 : 3,231.23 = 1,115.91 : x
  2. Step 2: Convert to fraction form
    2,158.11/3,231.23 = 1,115.91/x
  3. Step 3: Cross multiply
    2,158.11x = 3,231.23 × 1,115.91
  4. Step 4: Simplify right side
    2,158.11x = 3,605,756.29
  5. Step 5: Solve for x
    x = 3,605,756.29/2,158.11
  6. Step 6: Final answer
    x = 1,670.79

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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.