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Finding the Fourth Proportional to 275,125.38, 379,511.75 and 172,988.97

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Solution

The fourth proportional to 275,125.38, 379,511.75 and 172,988.97 is: 238,623.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,125.38 : 379,511.75 = 172,988.97 : x
  2. Step 2: Convert to fraction form
    275,125.38/379,511.75 = 172,988.97/x
  3. Step 3: Cross multiply
    275,125.38x = 379,511.75 × 172,988.97
  4. Step 4: Simplify right side
    275,125.38x = 65,651,345,870.45
  5. Step 5: Solve for x
    x = 65,651,345,870.45/275,125.38
  6. Step 6: Final answer
    x = 238,623.37

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1.5x scale

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.