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Finding the Fourth Proportional to 393,067.88, 542,435.50 and 223,311.32

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Solution

The fourth proportional to 393,067.88, 542,435.50 and 223,311.32 is: 308,170.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,067.88 : 542,435.50 = 223,311.32 : x
  2. Step 2: Convert to fraction form
    393,067.88/542,435.50 = 223,311.32/x
  3. Step 3: Cross multiply
    393,067.88x = 542,435.50 × 223,311.32
  4. Step 4: Simplify right side
    393,067.88x = 121,131,987,519.86
  5. Step 5: Solve for x
    x = 121,131,987,519.86/393,067.88
  6. Step 6: Final answer
    x = 308,170.66

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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.