Home / 3,128.19-4,690.91-1,667.03

Finding the Fourth Proportional to 3,128.19, 4,690.91 and 1,667.03

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Solution

The fourth proportional to 3,128.19, 4,690.91 and 1,667.03 is: 2,499.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.19 : 4,690.91 = 1,667.03 : x
  2. Step 2: Convert to fraction form
    3,128.19/4,690.91 = 1,667.03/x
  3. Step 3: Cross multiply
    3,128.19x = 4,690.91 × 1,667.03
  4. Step 4: Simplify right side
    3,128.19x = 7,819,879.36
  5. Step 5: Solve for x
    x = 7,819,879.36/3,128.19
  6. Step 6: Final answer
    x = 2,499.81

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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.