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Finding the Fourth Proportional to 274,654, 379,028.40 and 155,422

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Solution

The fourth proportional to 274,654, 379,028.40 and 155,422 is: 214,485.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,654 : 379,028.40 = 155,422 : x
  2. Step 2: Convert to fraction form
    274,654/379,028.40 = 155,422/x
  3. Step 3: Cross multiply
    274,654x = 379,028.40 × 155,422
  4. Step 4: Simplify right side
    274,654x = 58,909,351,984.80
  5. Step 5: Solve for x
    x = 58,909,351,984.80/274,654
  6. Step 6: Final answer
    x = 214,485.69

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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.