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Finding the Fourth Proportional to 485,857.70, 670,481.87 and 270,997.60

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Solution

The fourth proportional to 485,857.70, 670,481.87 and 270,997.60 is: 373,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,857.70 : 670,481.87 = 270,997.60 : x
  2. Step 2: Convert to fraction form
    485,857.70/670,481.87 = 270,997.60/x
  3. Step 3: Cross multiply
    485,857.70x = 670,481.87 × 270,997.60
  4. Step 4: Simplify right side
    485,857.70x = 181,698,976,614.80
  5. Step 5: Solve for x
    x = 181,698,976,614.80/485,857.70
  6. Step 6: Final answer
    x = 373,975.70

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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.