Home / 2,311.75-3,189.26-1,680.89

Finding the Fourth Proportional to 2,311.75, 3,189.26 and 1,680.89

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Solution

The fourth proportional to 2,311.75, 3,189.26 and 1,680.89 is: 2,318.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.75 : 3,189.26 = 1,680.89 : x
  2. Step 2: Convert to fraction form
    2,311.75/3,189.26 = 1,680.89/x
  3. Step 3: Cross multiply
    2,311.75x = 3,189.26 × 1,680.89
  4. Step 4: Simplify right side
    2,311.75x = 5,360,795.24
  5. Step 5: Solve for x
    x = 5,360,795.24/2,311.75
  6. Step 6: Final answer
    x = 2,318.93

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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.