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Finding the Fourth Proportional to 443,855.23, 666,128.09 and 309,865.39

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Solution

The fourth proportional to 443,855.23, 666,128.09 and 309,865.39 is: 465,039.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,855.23 : 666,128.09 = 309,865.39 : x
  2. Step 2: Convert to fraction form
    443,855.23/666,128.09 = 309,865.39/x
  3. Step 3: Cross multiply
    443,855.23x = 666,128.09 × 309,865.39
  4. Step 4: Simplify right side
    443,855.23x = 206,410,040,397.81
  5. Step 5: Solve for x
    x = 206,410,040,397.81/443,855.23
  6. Step 6: Final answer
    x = 465,039.11

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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.