Home / 2,991.67-4,129.79-1,872.37

Finding the Fourth Proportional to 2,991.67, 4,129.79 and 1,872.37

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Solution

The fourth proportional to 2,991.67, 4,129.79 and 1,872.37 is: 2,584.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.67 : 4,129.79 = 1,872.37 : x
  2. Step 2: Convert to fraction form
    2,991.67/4,129.79 = 1,872.37/x
  3. Step 3: Cross multiply
    2,991.67x = 4,129.79 × 1,872.37
  4. Step 4: Simplify right side
    2,991.67x = 7,732,467.47
  5. Step 5: Solve for x
    x = 7,732,467.47/2,991.67
  6. Step 6: Final answer
    x = 2,584.67

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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.