Home / 3,149.85-4,720.90-1,392.96

Finding the Fourth Proportional to 3,149.85, 4,720.90 and 1,392.96

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Solution

The fourth proportional to 3,149.85, 4,720.90 and 1,392.96 is: 2,087.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,149.85 : 4,720.90 = 1,392.96 : x
  2. Step 2: Convert to fraction form
    3,149.85/4,720.90 = 1,392.96/x
  3. Step 3: Cross multiply
    3,149.85x = 4,720.90 × 1,392.96
  4. Step 4: Simplify right side
    3,149.85x = 6,576,024.86
  5. Step 5: Solve for x
    x = 6,576,024.86/3,149.85
  6. Step 6: Final answer
    x = 2,087.73

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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.