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Finding the Fourth Proportional to 494,653.50, 682,621.92 and 279,788.94

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Solution

The fourth proportional to 494,653.50, 682,621.92 and 279,788.94 is: 386,108.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,653.50 : 682,621.92 = 279,788.94 : x
  2. Step 2: Convert to fraction form
    494,653.50/682,621.92 = 279,788.94/x
  3. Step 3: Cross multiply
    494,653.50x = 682,621.92 × 279,788.94
  4. Step 4: Simplify right side
    494,653.50x = 190,990,063,417.57
  5. Step 5: Solve for x
    x = 190,990,063,417.57/494,653.50
  6. Step 6: Final answer
    x = 386,108.79

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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.