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Finding the Fourth Proportional to 275,363.84, 379,978.80 and 154,488.80

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Solution

The fourth proportional to 275,363.84, 379,978.80 and 154,488.80 is: 213,181.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,363.84 : 379,978.80 = 154,488.80 : x
  2. Step 2: Convert to fraction form
    275,363.84/379,978.80 = 154,488.80/x
  3. Step 3: Cross multiply
    275,363.84x = 379,978.80 × 154,488.80
  4. Step 4: Simplify right side
    275,363.84x = 58,702,468,837.44
  5. Step 5: Solve for x
    x = 58,702,468,837.44/275,363.84
  6. Step 6: Final answer
    x = 213,181.47

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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.