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Finding the Fourth Proportional to 577,813.80, 866,720.70 and 518,910.60

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Solution

The fourth proportional to 577,813.80, 866,720.70 and 518,910.60 is: 778,365.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,813.80 : 866,720.70 = 518,910.60 : x
  2. Step 2: Convert to fraction form
    577,813.80/866,720.70 = 518,910.60/x
  3. Step 3: Cross multiply
    577,813.80x = 866,720.70 × 518,910.60
  4. Step 4: Simplify right side
    577,813.80x = 449,750,558,469.42
  5. Step 5: Solve for x
    x = 449,750,558,469.42/577,813.80
  6. Step 6: Final answer
    x = 778,365.90

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1.5x scale

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.