Home / 2,311.70-3,189.86-1,316.85

Finding the Fourth Proportional to 2,311.70, 3,189.86 and 1,316.85

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Solution

The fourth proportional to 2,311.70, 3,189.86 and 1,316.85 is: 1,817.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.70 : 3,189.86 = 1,316.85 : x
  2. Step 2: Convert to fraction form
    2,311.70/3,189.86 = 1,316.85/x
  3. Step 3: Cross multiply
    2,311.70x = 3,189.86 × 1,316.85
  4. Step 4: Simplify right side
    2,311.70x = 4,200,560.56
  5. Step 5: Solve for x
    x = 4,200,560.56/2,311.70
  6. Step 6: Final answer
    x = 1,817.09

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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.