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Finding the Fourth Proportional to 644,171.67, 889,038.90 and 389,524.68

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Solution

The fourth proportional to 644,171.67, 889,038.90 and 389,524.68 is: 537,593.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,171.67 : 889,038.90 = 389,524.68 : x
  2. Step 2: Convert to fraction form
    644,171.67/889,038.90 = 389,524.68/x
  3. Step 3: Cross multiply
    644,171.67x = 889,038.90 × 389,524.68
  4. Step 4: Simplify right side
    644,171.67x = 346,302,593,030.05
  5. Step 5: Solve for x
    x = 346,302,593,030.05/644,171.67
  6. Step 6: Final answer
    x = 537,593.64

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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.