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Finding the Fourth Proportional to 643,953.80, 966,060.30 and 539,496.20

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Solution

The fourth proportional to 643,953.80, 966,060.30 and 539,496.20 is: 809,352.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,953.80 : 966,060.30 = 539,496.20 : x
  2. Step 2: Convert to fraction form
    643,953.80/966,060.30 = 539,496.20/x
  3. Step 3: Cross multiply
    643,953.80x = 966,060.30 × 539,496.20
  4. Step 4: Simplify right side
    643,953.80x = 521,185,860,820.86
  5. Step 5: Solve for x
    x = 521,185,860,820.86/643,953.80
  6. Step 6: Final answer
    x = 809,352.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.