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Finding the Fourth Proportional to 578,078.20, 866,598.90 and 515,092.60

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Solution

The fourth proportional to 578,078.20, 866,598.90 and 515,092.60 is: 772,176.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,078.20 : 866,598.90 = 515,092.60 : x
  2. Step 2: Convert to fraction form
    578,078.20/866,598.90 = 515,092.60/x
  3. Step 3: Cross multiply
    578,078.20x = 866,598.90 × 515,092.60
  4. Step 4: Simplify right side
    578,078.20x = 446,378,680,558.14
  5. Step 5: Solve for x
    x = 446,378,680,558.14/578,078.20
  6. Step 6: Final answer
    x = 772,176.98

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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.