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Finding the Fourth Proportional to 443,342.20, 664,559.70 and 218,356.60

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Solution

The fourth proportional to 443,342.20, 664,559.70 and 218,356.60 is: 327,311.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,342.20 : 664,559.70 = 218,356.60 : x
  2. Step 2: Convert to fraction form
    443,342.20/664,559.70 = 218,356.60/x
  3. Step 3: Cross multiply
    443,342.20x = 664,559.70 × 218,356.60
  4. Step 4: Simplify right side
    443,342.20x = 145,110,996,589.02
  5. Step 5: Solve for x
    x = 145,110,996,589.02/443,342.20
  6. Step 6: Final answer
    x = 327,311.49

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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.