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Finding the Fourth Proportional to 275,128.88, 379,516.59 and 172,992.47

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Solution

The fourth proportional to 275,128.88, 379,516.59 and 172,992.47 is: 238,628.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,128.88 : 379,516.59 = 172,992.47 : x
  2. Step 2: Convert to fraction form
    275,128.88/379,516.59 = 172,992.47/x
  3. Step 3: Cross multiply
    275,128.88x = 379,516.59 × 172,992.47
  4. Step 4: Simplify right side
    275,128.88x = 65,653,512,310.08
  5. Step 5: Solve for x
    x = 65,653,512,310.08/275,128.88
  6. Step 6: Final answer
    x = 238,628.21

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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.