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Finding the Fourth Proportional to 705,846.45, 973,989.03 and 399,857.28

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Solution

The fourth proportional to 705,846.45, 973,989.03 and 399,857.28 is: 551,758.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,846.45 : 973,989.03 = 399,857.28 : x
  2. Step 2: Convert to fraction form
    705,846.45/973,989.03 = 399,857.28/x
  3. Step 3: Cross multiply
    705,846.45x = 973,989.03 × 399,857.28
  4. Step 4: Simplify right side
    705,846.45x = 389,456,604,285.64
  5. Step 5: Solve for x
    x = 389,456,604,285.64/705,846.45
  6. Step 6: Final answer
    x = 551,758.25

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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.