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Finding the Fourth Proportional to 705,388.65, 973,499.81 and 399,539.42

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Solution

The fourth proportional to 705,388.65, 973,499.81 and 399,539.42 is: 551,400.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,388.65 : 973,499.81 = 399,539.42 : x
  2. Step 2: Convert to fraction form
    705,388.65/973,499.81 = 399,539.42/x
  3. Step 3: Cross multiply
    705,388.65x = 973,499.81 × 399,539.42
  4. Step 4: Simplify right side
    705,388.65x = 388,951,542,592.31
  5. Step 5: Solve for x
    x = 388,951,542,592.31/705,388.65
  6. Step 6: Final answer
    x = 551,400.35

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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.