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Finding the Fourth Proportional to 619,131.25, 928,697.08 and 408,719.98

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Solution

The fourth proportional to 619,131.25, 928,697.08 and 408,719.98 is: 613,080.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,131.25 : 928,697.08 = 408,719.98 : x
  2. Step 2: Convert to fraction form
    619,131.25/928,697.08 = 408,719.98/x
  3. Step 3: Cross multiply
    619,131.25x = 928,697.08 × 408,719.98
  4. Step 4: Simplify right side
    619,131.25x = 379,577,048,620.12
  5. Step 5: Solve for x
    x = 379,577,048,620.12/619,131.25
  6. Step 6: Final answer
    x = 613,080.10

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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.