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Finding the Fourth Proportional to 694,894.59, 958,970.78 and 388,963.37

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Solution

The fourth proportional to 694,894.59, 958,970.78 and 388,963.37 is: 536,778.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,894.59 : 958,970.78 = 388,963.37 : x
  2. Step 2: Convert to fraction form
    694,894.59/958,970.78 = 388,963.37/x
  3. Step 3: Cross multiply
    694,894.59x = 958,970.78 × 388,963.37
  4. Step 4: Simplify right side
    694,894.59x = 373,004,499,580.66
  5. Step 5: Solve for x
    x = 373,004,499,580.66/694,894.59
  6. Step 6: Final answer
    x = 536,778.53

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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.