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Finding the Fourth Proportional to 644,516.79, 889,458.39 and 440,994.57

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Solution

The fourth proportional to 644,516.79, 889,458.39 and 440,994.57 is: 608,589.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,516.79 : 889,458.39 = 440,994.57 : x
  2. Step 2: Convert to fraction form
    644,516.79/889,458.39 = 440,994.57/x
  3. Step 3: Cross multiply
    644,516.79x = 889,458.39 × 440,994.57
  4. Step 4: Simplify right side
    644,516.79x = 392,246,320,230.94
  5. Step 5: Solve for x
    x = 392,246,320,230.94/644,516.79
  6. Step 6: Final answer
    x = 608,589.76

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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.