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Finding the Fourth Proportional to 443,179.20, 664,768.80 and 394,190.40

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Solution

The fourth proportional to 443,179.20, 664,768.80 and 394,190.40 is: 591,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,179.20 : 664,768.80 = 394,190.40 : x
  2. Step 2: Convert to fraction form
    443,179.20/664,768.80 = 394,190.40/x
  3. Step 3: Cross multiply
    443,179.20x = 664,768.80 × 394,190.40
  4. Step 4: Simplify right side
    443,179.20x = 262,045,479,179.52
  5. Step 5: Solve for x
    x = 262,045,479,179.52/443,179.20
  6. Step 6: Final answer
    x = 591,285.60

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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.