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Finding the Fourth Proportional to 443,911.78, 666,086.37 and 275,388.85

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Solution

The fourth proportional to 443,911.78, 666,086.37 and 275,388.85 is: 413,218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,911.78 : 666,086.37 = 275,388.85 : x
  2. Step 2: Convert to fraction form
    443,911.78/666,086.37 = 275,388.85/x
  3. Step 3: Cross multiply
    443,911.78x = 666,086.37 × 275,388.85
  4. Step 4: Simplify right side
    443,911.78x = 183,432,759,434.98
  5. Step 5: Solve for x
    x = 183,432,759,434.98/443,911.78
  6. Step 6: Final answer
    x = 413,218.95

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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.