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Finding the Fourth Proportional to 644,173.67, 889,041.66 and 389,526.68

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Solution

The fourth proportional to 644,173.67, 889,041.66 and 389,526.68 is: 537,596.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,173.67 : 889,041.66 = 389,526.68 : x
  2. Step 2: Convert to fraction form
    644,173.67/889,041.66 = 389,526.68/x
  3. Step 3: Cross multiply
    644,173.67x = 889,041.66 × 389,526.68
  4. Step 4: Simplify right side
    644,173.67x = 346,305,446,201.49
  5. Step 5: Solve for x
    x = 346,305,446,201.49/644,173.67
  6. Step 6: Final answer
    x = 537,596.40

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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.