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Finding the Fourth Proportional to 443,013.80, 664,715.10 and 206,234.60

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Solution

The fourth proportional to 443,013.80, 664,715.10 and 206,234.60 is: 309,442.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,013.80 : 664,715.10 = 206,234.60 : x
  2. Step 2: Convert to fraction form
    443,013.80/664,715.10 = 206,234.60/x
  3. Step 3: Cross multiply
    443,013.80x = 664,715.10 × 206,234.60
  4. Step 4: Simplify right side
    443,013.80x = 137,087,252,762.46
  5. Step 5: Solve for x
    x = 137,087,252,762.46/443,013.80
  6. Step 6: Final answer
    x = 309,442.40

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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.