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Finding the Fourth Proportional to 2,283.86, 3,425.79 and 640.42

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Solution

The fourth proportional to 2,283.86, 3,425.79 and 640.42 is: 960.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,283.86 : 3,425.79 = 640.42 : x
  2. Step 2: Convert to fraction form
    2,283.86/3,425.79 = 640.42/x
  3. Step 3: Cross multiply
    2,283.86x = 3,425.79 × 640.42
  4. Step 4: Simplify right side
    2,283.86x = 2,193,944.43
  5. Step 5: Solve for x
    x = 2,193,944.43/2,283.86
  6. Step 6: Final answer
    x = 960.63

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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.