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Finding the Fourth Proportional to 399,578.43, 599,368.04 and 111,378.56

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Solution

The fourth proportional to 399,578.43, 599,368.04 and 111,378.56 is: 167,067.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,578.43 : 599,368.04 = 111,378.56 : x
  2. Step 2: Convert to fraction form
    399,578.43/599,368.04 = 111,378.56/x
  3. Step 3: Cross multiply
    399,578.43x = 599,368.04 × 111,378.56
  4. Step 4: Simplify right side
    399,578.43x = 66,756,749,205.22
  5. Step 5: Solve for x
    x = 66,756,749,205.22/399,578.43
  6. Step 6: Final answer
    x = 167,067.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.