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Finding the Fourth Proportional to 644,265.96, 888,943.78 and 389,611.88

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Solution

The fourth proportional to 644,265.96, 888,943.78 and 389,611.88 is: 537,577.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,265.96 : 888,943.78 = 389,611.88 : x
  2. Step 2: Convert to fraction form
    644,265.96/888,943.78 = 389,611.88/x
  3. Step 3: Cross multiply
    644,265.96x = 888,943.78 × 389,611.88
  4. Step 4: Simplify right side
    644,265.96x = 346,343,057,340.11
  5. Step 5: Solve for x
    x = 346,343,057,340.11/644,265.96
  6. Step 6: Final answer
    x = 537,577.77

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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.