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Finding the Fourth Proportional to 397,647, 548,752.86 and 218,799

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Solution

The fourth proportional to 397,647, 548,752.86 and 218,799 is: 301,942.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,647 : 548,752.86 = 218,799 : x
  2. Step 2: Convert to fraction form
    397,647/548,752.86 = 218,799/x
  3. Step 3: Cross multiply
    397,647x = 548,752.86 × 218,799
  4. Step 4: Simplify right side
    397,647x = 120,066,577,015.14
  5. Step 5: Solve for x
    x = 120,066,577,015.14/397,647
  6. Step 6: Final answer
    x = 301,942.62

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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.