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Finding the Fourth Proportional to 505,913.96, 698,133.85 and 279,544.88

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Solution

The fourth proportional to 505,913.96, 698,133.85 and 279,544.88 is: 385,756.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,913.96 : 698,133.85 = 279,544.88 : x
  2. Step 2: Convert to fraction form
    505,913.96/698,133.85 = 279,544.88/x
  3. Step 3: Cross multiply
    505,913.96x = 698,133.85 × 279,544.88
  4. Step 4: Simplify right side
    505,913.96x = 195,159,739,132.66
  5. Step 5: Solve for x
    x = 195,159,739,132.66/505,913.96
  6. Step 6: Final answer
    x = 385,756.78

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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.