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Finding the Fourth Proportional to 619,812.80, 929,978.40 and 199,217.60

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Solution

The fourth proportional to 619,812.80, 929,978.40 and 199,217.60 is: 298,909.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,812.80 : 929,978.40 = 199,217.60 : x
  2. Step 2: Convert to fraction form
    619,812.80/929,978.40 = 199,217.60/x
  3. Step 3: Cross multiply
    619,812.80x = 929,978.40 × 199,217.60
  4. Step 4: Simplify right side
    619,812.80x = 185,268,064,899.84
  5. Step 5: Solve for x
    x = 185,268,064,899.84/619,812.80
  6. Step 6: Final answer
    x = 298,909.71

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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.