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Finding the Fourth Proportional to 560,198.22, 773,138.89 and 318,517

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Solution

The fourth proportional to 560,198.22, 773,138.89 and 318,517 is: 439,590.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,198.22 : 773,138.89 = 318,517 : x
  2. Step 2: Convert to fraction form
    560,198.22/773,138.89 = 318,517/x
  3. Step 3: Cross multiply
    560,198.22x = 773,138.89 × 318,517
  4. Step 4: Simplify right side
    560,198.22x = 246,257,879,826.13
  5. Step 5: Solve for x
    x = 246,257,879,826.13/560,198.22
  6. Step 6: Final answer
    x = 439,590.61

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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.