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Finding the Fourth Proportional to 494,643.20, 682,612.80 and 279,785.60

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Solution

The fourth proportional to 494,643.20, 682,612.80 and 279,785.60 is: 386,107.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,643.20 : 682,612.80 = 279,785.60 : x
  2. Step 2: Convert to fraction form
    494,643.20/682,612.80 = 279,785.60/x
  3. Step 3: Cross multiply
    494,643.20x = 682,612.80 × 279,785.60
  4. Step 4: Simplify right side
    494,643.20x = 190,985,231,815.68
  5. Step 5: Solve for x
    x = 190,985,231,815.68/494,643.20
  6. Step 6: Final answer
    x = 386,107.06

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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.