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Finding the Fourth Proportional to 397,847, 549,028.86 and 218,999

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Solution

The fourth proportional to 397,847, 549,028.86 and 218,999 is: 302,218.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,847 : 549,028.86 = 218,999 : x
  2. Step 2: Convert to fraction form
    397,847/549,028.86 = 218,999/x
  3. Step 3: Cross multiply
    397,847x = 549,028.86 × 218,999
  4. Step 4: Simplify right side
    397,847x = 120,236,771,311.14
  5. Step 5: Solve for x
    x = 120,236,771,311.14/397,847
  6. Step 6: Final answer
    x = 302,218.62

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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.