Home / 388,939.40-582,242.70-231,086.60

Finding the Fourth Proportional to 388,939.40, 582,242.70 and 231,086.60

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Solution

The fourth proportional to 388,939.40, 582,242.70 and 231,086.60 is: 345,936.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,939.40 : 582,242.70 = 231,086.60 : x
  2. Step 2: Convert to fraction form
    388,939.40/582,242.70 = 231,086.60/x
  3. Step 3: Cross multiply
    388,939.40x = 582,242.70 × 231,086.60
  4. Step 4: Simplify right side
    388,939.40x = 134,548,485,917.82
  5. Step 5: Solve for x
    x = 134,548,485,917.82/388,939.40
  6. Step 6: Final answer
    x = 345,936.89

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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.