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Finding the Fourth Proportional to 647,067.12, 892,959.12 and 356,689

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Solution

The fourth proportional to 647,067.12, 892,959.12 and 356,689 is: 492,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,067.12 : 892,959.12 = 356,689 : x
  2. Step 2: Convert to fraction form
    647,067.12/892,959.12 = 356,689/x
  3. Step 3: Cross multiply
    647,067.12x = 892,959.12 × 356,689
  4. Step 4: Simplify right side
    647,067.12x = 318,508,695,553.68
  5. Step 5: Solve for x
    x = 318,508,695,553.68/647,067.12
  6. Step 6: Final answer
    x = 492,234.40

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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.