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Finding the Fourth Proportional to 3,269.80, 4,905.90 and 3,149.80

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Solution

The fourth proportional to 3,269.80, 4,905.90 and 3,149.80 is: 4,725.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,269.80 : 4,905.90 = 3,149.80 : x
  2. Step 2: Convert to fraction form
    3,269.80/4,905.90 = 3,149.80/x
  3. Step 3: Cross multiply
    3,269.80x = 4,905.90 × 3,149.80
  4. Step 4: Simplify right side
    3,269.80x = 15,452,603.82
  5. Step 5: Solve for x
    x = 15,452,603.82/3,269.80
  6. Step 6: Final answer
    x = 4,725.86

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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.