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Finding the Fourth Proportional to 443,630.70, 665,446.05 and 219,025.80

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Solution

The fourth proportional to 443,630.70, 665,446.05 and 219,025.80 is: 328,538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,630.70 : 665,446.05 = 219,025.80 : x
  2. Step 2: Convert to fraction form
    443,630.70/665,446.05 = 219,025.80/x
  3. Step 3: Cross multiply
    443,630.70x = 665,446.05 × 219,025.80
  4. Step 4: Simplify right side
    443,630.70x = 145,749,853,458.09
  5. Step 5: Solve for x
    x = 145,749,853,458.09/443,630.70
  6. Step 6: Final answer
    x = 328,538.70

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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.