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Finding the Fourth Proportional to 640,776.58, 883,855.05 and 410,969.87

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Solution

The fourth proportional to 640,776.58, 883,855.05 and 410,969.87 is: 566,871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,776.58 : 883,855.05 = 410,969.87 : x
  2. Step 2: Convert to fraction form
    640,776.58/883,855.05 = 410,969.87/x
  3. Step 3: Cross multiply
    640,776.58x = 883,855.05 × 410,969.87
  4. Step 4: Simplify right side
    640,776.58x = 363,237,792,351.39
  5. Step 5: Solve for x
    x = 363,237,792,351.39/640,776.58
  6. Step 6: Final answer
    x = 566,871.21

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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.