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Finding the Fourth Proportional to 443,516.20, 665,274.30 and 218,911.30

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Solution

The fourth proportional to 443,516.20, 665,274.30 and 218,911.30 is: 328,366.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,516.20 : 665,274.30 = 218,911.30 : x
  2. Step 2: Convert to fraction form
    443,516.20/665,274.30 = 218,911.30/x
  3. Step 3: Cross multiply
    443,516.20x = 665,274.30 × 218,911.30
  4. Step 4: Simplify right side
    443,516.20x = 145,636,061,869.59
  5. Step 5: Solve for x
    x = 145,636,061,869.59/443,516.20
  6. Step 6: Final answer
    x = 328,366.95

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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.