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Finding the Fourth Proportional to 275,364.34, 379,979.49 and 154,489.30

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Solution

The fourth proportional to 275,364.34, 379,979.49 and 154,489.30 is: 213,182.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,364.34 : 379,979.49 = 154,489.30 : x
  2. Step 2: Convert to fraction form
    275,364.34/379,979.49 = 154,489.30/x
  3. Step 3: Cross multiply
    275,364.34x = 379,979.49 × 154,489.30
  4. Step 4: Simplify right side
    275,364.34x = 58,702,765,424.46
  5. Step 5: Solve for x
    x = 58,702,765,424.46/275,364.34
  6. Step 6: Final answer
    x = 213,182.16

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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.