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Finding the Fourth Proportional to 505,847.12, 698,067.60 and 279,491

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Solution

The fourth proportional to 505,847.12, 698,067.60 and 279,491 is: 385,696.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,847.12 : 698,067.60 = 279,491 : x
  2. Step 2: Convert to fraction form
    505,847.12/698,067.60 = 279,491/x
  3. Step 3: Cross multiply
    505,847.12x = 698,067.60 × 279,491
  4. Step 4: Simplify right side
    505,847.12x = 195,103,611,591.60
  5. Step 5: Solve for x
    x = 195,103,611,591.60/505,847.12
  6. Step 6: Final answer
    x = 385,696.79

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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.