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Finding the Fourth Proportional to 456,940, 629,450.49 and 388,738.54

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Solution

The fourth proportional to 456,940, 629,450.49 and 388,738.54 is: 535,500.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,940 : 629,450.49 = 388,738.54 : x
  2. Step 2: Convert to fraction form
    456,940/629,450.49 = 388,738.54/x
  3. Step 3: Cross multiply
    456,940x = 629,450.49 × 388,738.54
  4. Step 4: Simplify right side
    456,940x = 244,691,664,484.89
  5. Step 5: Solve for x
    x = 244,691,664,484.89/456,940
  6. Step 6: Final answer
    x = 535,500.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.