Home / 3,185.21-4,778.90-1,645.13

Finding the Fourth Proportional to 3,185.21, 4,778.90 and 1,645.13

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Solution

The fourth proportional to 3,185.21, 4,778.90 and 1,645.13 is: 2,468.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.21 : 4,778.90 = 1,645.13 : x
  2. Step 2: Convert to fraction form
    3,185.21/4,778.90 = 1,645.13/x
  3. Step 3: Cross multiply
    3,185.21x = 4,778.90 × 1,645.13
  4. Step 4: Simplify right side
    3,185.21x = 7,861,879.64
  5. Step 5: Solve for x
    x = 7,861,879.64/3,185.21
  6. Step 6: Final answer
    x = 2,468.25

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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.