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Finding the Fourth Proportional to 577,985.60, 866,978.40 and 521,998.40

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Solution

The fourth proportional to 577,985.60, 866,978.40 and 521,998.40 is: 782,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,985.60 : 866,978.40 = 521,998.40 : x
  2. Step 2: Convert to fraction form
    577,985.60/866,978.40 = 521,998.40/x
  3. Step 3: Cross multiply
    577,985.60x = 866,978.40 × 521,998.40
  4. Step 4: Simplify right side
    577,985.60x = 452,561,337,634.56
  5. Step 5: Solve for x
    x = 452,561,337,634.56/577,985.60
  6. Step 6: Final answer
    x = 782,997.60

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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.