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Finding the Fourth Proportional to 621,163.49, 857,200.52 and 391,868.89

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Solution

The fourth proportional to 621,163.49, 857,200.52 and 391,868.89 is: 540,775.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,163.49 : 857,200.52 = 391,868.89 : x
  2. Step 2: Convert to fraction form
    621,163.49/857,200.52 = 391,868.89/x
  3. Step 3: Cross multiply
    621,163.49x = 857,200.52 × 391,868.89
  4. Step 4: Simplify right side
    621,163.49x = 335,910,215,116.49
  5. Step 5: Solve for x
    x = 335,910,215,116.49/621,163.49
  6. Step 6: Final answer
    x = 540,775.86

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1.5x scale

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.