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Finding the Fourth Proportional to 443,432.40, 664,711.20 and 218,608.80

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Solution

The fourth proportional to 443,432.40, 664,711.20 and 218,608.80 is: 327,697.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,432.40 : 664,711.20 = 218,608.80 : x
  2. Step 2: Convert to fraction form
    443,432.40/664,711.20 = 218,608.80/x
  3. Step 3: Cross multiply
    443,432.40x = 664,711.20 × 218,608.80
  4. Step 4: Simplify right side
    443,432.40x = 145,311,717,778.56
  5. Step 5: Solve for x
    x = 145,311,717,778.56/443,432.40
  6. Step 6: Final answer
    x = 327,697.57

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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.