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Finding the Fourth Proportional to 2,179.34, 3,269.56 and 640.34

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Solution

The fourth proportional to 2,179.34, 3,269.56 and 640.34 is: 960.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.34 : 3,269.56 = 640.34 : x
  2. Step 2: Convert to fraction form
    2,179.34/3,269.56 = 640.34/x
  3. Step 3: Cross multiply
    2,179.34x = 3,269.56 × 640.34
  4. Step 4: Simplify right side
    2,179.34x = 2,093,630.05
  5. Step 5: Solve for x
    x = 2,093,630.05/2,179.34
  6. Step 6: Final answer
    x = 960.67

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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.