Home / 2,609.45-3,912.91-1,291.68

Finding the Fourth Proportional to 2,609.45, 3,912.91 and 1,291.68

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Solution

The fourth proportional to 2,609.45, 3,912.91 and 1,291.68 is: 1,936.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,609.45 : 3,912.91 = 1,291.68 : x
  2. Step 2: Convert to fraction form
    2,609.45/3,912.91 = 1,291.68/x
  3. Step 3: Cross multiply
    2,609.45x = 3,912.91 × 1,291.68
  4. Step 4: Simplify right side
    2,609.45x = 5,054,224.36
  5. Step 5: Solve for x
    x = 5,054,224.36/2,609.45
  6. Step 6: Final answer
    x = 1,936.89

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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.