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Finding the Fourth Proportional to 643,871.50, 888,553.10 and 353,509.85

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Solution

The fourth proportional to 643,871.50, 888,553.10 and 353,509.85 is: 487,849.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,871.50 : 888,553.10 = 353,509.85 : x
  2. Step 2: Convert to fraction form
    643,871.50/888,553.10 = 353,509.85/x
  3. Step 3: Cross multiply
    643,871.50x = 888,553.10 × 353,509.85
  4. Step 4: Simplify right side
    643,871.50x = 314,112,276,203.19
  5. Step 5: Solve for x
    x = 314,112,276,203.19/643,871.50
  6. Step 6: Final answer
    x = 487,849.33

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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.