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Finding the Fourth Proportional to 3,425.80, 5,136.90 and 1,234.20

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Solution

The fourth proportional to 3,425.80, 5,136.90 and 1,234.20 is: 1,850.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,425.80 : 5,136.90 = 1,234.20 : x
  2. Step 2: Convert to fraction form
    3,425.80/5,136.90 = 1,234.20/x
  3. Step 3: Cross multiply
    3,425.80x = 5,136.90 × 1,234.20
  4. Step 4: Simplify right side
    3,425.80x = 6,339,961.98
  5. Step 5: Solve for x
    x = 6,339,961.98/3,425.80
  6. Step 6: Final answer
    x = 1,850.65

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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.