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Finding the Fourth Proportional to 577,990.80, 866,986.20 and 519,087.60

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Solution

The fourth proportional to 577,990.80, 866,986.20 and 519,087.60 is: 778,631.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,990.80 : 866,986.20 = 519,087.60 : x
  2. Step 2: Convert to fraction form
    577,990.80/866,986.20 = 519,087.60/x
  3. Step 3: Cross multiply
    577,990.80x = 866,986.20 × 519,087.60
  4. Step 4: Simplify right side
    577,990.80x = 450,041,785,791.12
  5. Step 5: Solve for x
    x = 450,041,785,791.12/577,990.80
  6. Step 6: Final answer
    x = 778,631.40

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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.