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Finding the Fourth Proportional to 2,144.45, 3,216.65 and 683.73

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Solution

The fourth proportional to 2,144.45, 3,216.65 and 683.73 is: 1,025.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,144.45 : 3,216.65 = 683.73 : x
  2. Step 2: Convert to fraction form
    2,144.45/3,216.65 = 683.73/x
  3. Step 3: Cross multiply
    2,144.45x = 3,216.65 × 683.73
  4. Step 4: Simplify right side
    2,144.45x = 2,199,316.69
  5. Step 5: Solve for x
    x = 2,199,316.69/2,144.45
  6. Step 6: Final answer
    x = 1,025.59

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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.