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Finding the Fourth Proportional to 683,745.57, 943,417.33 and 393,339.31

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Solution

The fourth proportional to 683,745.57, 943,417.33 and 393,339.31 is: 542,721.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    683,745.57 : 943,417.33 = 393,339.31 : x
  2. Step 2: Convert to fraction form
    683,745.57/943,417.33 = 393,339.31/x
  3. Step 3: Cross multiply
    683,745.57x = 943,417.33 × 393,339.31
  4. Step 4: Simplify right side
    683,745.57x = 371,083,118,282.35
  5. Step 5: Solve for x
    x = 371,083,118,282.35/683,745.57
  6. Step 6: Final answer
    x = 542,721.06

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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.