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Finding the Fourth Proportional to 617,998.80, 926,998.20 and 439,539.60

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Solution

The fourth proportional to 617,998.80, 926,998.20 and 439,539.60 is: 659,309.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,998.80 : 926,998.20 = 439,539.60 : x
  2. Step 2: Convert to fraction form
    617,998.80/926,998.20 = 439,539.60/x
  3. Step 3: Cross multiply
    617,998.80x = 926,998.20 × 439,539.60
  4. Step 4: Simplify right side
    617,998.80x = 407,452,418,028.72
  5. Step 5: Solve for x
    x = 407,452,418,028.72/617,998.80
  6. Step 6: Final answer
    x = 659,309.40

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Similar ratio
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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.