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Finding the Fourth Proportional to 647,936.31, 893,735.79 and 393,287.51

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Solution

The fourth proportional to 647,936.31, 893,735.79 and 393,287.51 is: 542,484.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,936.31 : 893,735.79 = 393,287.51 : x
  2. Step 2: Convert to fraction form
    647,936.31/893,735.79 = 393,287.51/x
  3. Step 3: Cross multiply
    647,936.31x = 893,735.79 × 393,287.51
  4. Step 4: Simplify right side
    647,936.31x = 351,495,118,978.30
  5. Step 5: Solve for x
    x = 351,495,118,978.30/647,936.31
  6. Step 6: Final answer
    x = 542,484.06

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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.