Home / 3,185.20-4,778.91-1,431.45

Finding the Fourth Proportional to 3,185.20, 4,778.91 and 1,431.45

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Solution

The fourth proportional to 3,185.20, 4,778.91 and 1,431.45 is: 2,147.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.20 : 4,778.91 = 1,431.45 : x
  2. Step 2: Convert to fraction form
    3,185.20/4,778.91 = 1,431.45/x
  3. Step 3: Cross multiply
    3,185.20x = 4,778.91 × 1,431.45
  4. Step 4: Simplify right side
    3,185.20x = 6,840,746.82
  5. Step 5: Solve for x
    x = 6,840,746.82/3,185.20
  6. Step 6: Final answer
    x = 2,147.67

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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.