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Finding the Fourth Proportional to 443,910.78, 666,084.87 and 275,387.85

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Solution

The fourth proportional to 443,910.78, 666,084.87 and 275,387.85 is: 413,217.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,910.78 : 666,084.87 = 275,387.85 : x
  2. Step 2: Convert to fraction form
    443,910.78/666,084.87 = 275,387.85/x
  3. Step 3: Cross multiply
    443,910.78x = 666,084.87 × 275,387.85
  4. Step 4: Simplify right side
    443,910.78x = 183,431,680,266.83
  5. Step 5: Solve for x
    x = 183,431,680,266.83/443,910.78
  6. Step 6: Final answer
    x = 413,217.45

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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.