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Finding the Fourth Proportional to 644,513.76, 889,454.26 and 440,991.56

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Solution

The fourth proportional to 644,513.76, 889,454.26 and 440,991.56 is: 608,585.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,513.76 : 889,454.26 = 440,991.56 : x
  2. Step 2: Convert to fraction form
    644,513.76/889,454.26 = 440,991.56/x
  3. Step 3: Cross multiply
    644,513.76x = 889,454.26 × 440,991.56
  4. Step 4: Simplify right side
    644,513.76x = 392,241,821,666.05
  5. Step 5: Solve for x
    x = 392,241,821,666.05/644,513.76
  6. Step 6: Final answer
    x = 608,585.64

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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.