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Finding the Fourth Proportional to 439,905.70, 659,858.55 and 389,167.30

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Solution

The fourth proportional to 439,905.70, 659,858.55 and 389,167.30 is: 583,750.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,905.70 : 659,858.55 = 389,167.30 : x
  2. Step 2: Convert to fraction form
    439,905.70/659,858.55 = 389,167.30/x
  3. Step 3: Cross multiply
    439,905.70x = 659,858.55 × 389,167.30
  4. Step 4: Simplify right side
    439,905.70x = 256,795,370,285.42
  5. Step 5: Solve for x
    x = 256,795,370,285.42/439,905.70
  6. Step 6: Final answer
    x = 583,750.95

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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.