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Finding the Fourth Proportional to 485,857.64, 670,481.78 and 270,997.54

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Solution

The fourth proportional to 485,857.64, 670,481.78 and 270,997.54 is: 373,975.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,857.64 : 670,481.78 = 270,997.54 : x
  2. Step 2: Convert to fraction form
    485,857.64/670,481.78 = 270,997.54/x
  3. Step 3: Cross multiply
    485,857.64x = 670,481.78 × 270,997.54
  4. Step 4: Simplify right side
    485,857.64x = 181,698,912,994.82
  5. Step 5: Solve for x
    x = 181,698,912,994.82/485,857.64
  6. Step 6: Final answer
    x = 373,975.62

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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.