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Finding the Fourth Proportional to 378,384.89, 521,628.57 and 297,672.26

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Solution

The fourth proportional to 378,384.89, 521,628.57 and 297,672.26 is: 410,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,384.89 : 521,628.57 = 297,672.26 : x
  2. Step 2: Convert to fraction form
    378,384.89/521,628.57 = 297,672.26/x
  3. Step 3: Cross multiply
    378,384.89x = 521,628.57 × 297,672.26
  4. Step 4: Simplify right side
    378,384.89x = 155,274,352,704.33
  5. Step 5: Solve for x
    x = 155,274,352,704.33/378,384.89
  6. Step 6: Final answer
    x = 410,360.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.