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Finding the Fourth Proportional to 647,000.31, 892,926.86 and 388,960.79

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Solution

The fourth proportional to 647,000.31, 892,926.86 and 388,960.79 is: 536,805.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,000.31 : 892,926.86 = 388,960.79 : x
  2. Step 2: Convert to fraction form
    647,000.31/892,926.86 = 388,960.79/x
  3. Step 3: Cross multiply
    647,000.31x = 892,926.86 × 388,960.79
  4. Step 4: Simplify right side
    647,000.31x = 347,313,536,877.82
  5. Step 5: Solve for x
    x = 347,313,536,877.82/647,000.31
  6. Step 6: Final answer
    x = 536,805.83

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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.