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Finding the Fourth Proportional to 274,615, 378,974.46 and 155,383

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Solution

The fourth proportional to 274,615, 378,974.46 and 155,383 is: 214,431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,615 : 378,974.46 = 155,383 : x
  2. Step 2: Convert to fraction form
    274,615/378,974.46 = 155,383/x
  3. Step 3: Cross multiply
    274,615x = 378,974.46 × 155,383
  4. Step 4: Simplify right side
    274,615x = 58,886,188,518.18
  5. Step 5: Solve for x
    x = 58,886,188,518.18/274,615
  6. Step 6: Final answer
    x = 214,431.80

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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.