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Finding the Fourth Proportional to 505,878.47, 698,107.33 and 279,519.11

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Solution

The fourth proportional to 505,878.47, 698,107.33 and 279,519.11 is: 385,733.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,878.47 : 698,107.33 = 279,519.11 : x
  2. Step 2: Convert to fraction form
    505,878.47/698,107.33 = 279,519.11/x
  3. Step 3: Cross multiply
    505,878.47x = 698,107.33 × 279,519.11
  4. Step 4: Simplify right side
    505,878.47x = 195,134,339,566.08
  5. Step 5: Solve for x
    x = 195,134,339,566.08/505,878.47
  6. Step 6: Final answer
    x = 385,733.63

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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.