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Finding the Fourth Proportional to 640.37, 959.50 and 396.37

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Solution

The fourth proportional to 640.37, 959.50 and 396.37 is: 593.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.37 : 959.50 = 396.37 : x
  2. Step 2: Convert to fraction form
    640.37/959.50 = 396.37/x
  3. Step 3: Cross multiply
    640.37x = 959.50 × 396.37
  4. Step 4: Simplify right side
    640.37x = 380,310.24
  5. Step 5: Solve for x
    x = 380,310.24/640.37
  6. Step 6: Final answer
    x = 593.90

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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.