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Finding the Fourth Proportional to 2,122.52, 3,183.72 and 641.70

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Solution

The fourth proportional to 2,122.52, 3,183.72 and 641.70 is: 962.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.52 : 3,183.72 = 641.70 : x
  2. Step 2: Convert to fraction form
    2,122.52/3,183.72 = 641.70/x
  3. Step 3: Cross multiply
    2,122.52x = 3,183.72 × 641.70
  4. Step 4: Simplify right side
    2,122.52x = 2,042,993.12
  5. Step 5: Solve for x
    x = 2,042,993.12/2,122.52
  6. Step 6: Final answer
    x = 962.53

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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.