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Finding the Fourth Proportional to 577,619.60, 866,487.30 and 198,490.40

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Solution

The fourth proportional to 577,619.60, 866,487.30 and 198,490.40 is: 297,755.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,619.60 : 866,487.30 = 198,490.40 : x
  2. Step 2: Convert to fraction form
    577,619.60/866,487.30 = 198,490.40/x
  3. Step 3: Cross multiply
    577,619.60x = 866,487.30 × 198,490.40
  4. Step 4: Simplify right side
    577,619.60x = 171,989,410,771.92
  5. Step 5: Solve for x
    x = 171,989,410,771.92/577,619.60
  6. Step 6: Final answer
    x = 297,755.50

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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.