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Finding the Fourth Proportional to 275,805.81, 380,650.39 and 154,956.44

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Solution

The fourth proportional to 275,805.81, 380,650.39 and 154,956.44 is: 213,861.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,805.81 : 380,650.39 = 154,956.44 : x
  2. Step 2: Convert to fraction form
    275,805.81/380,650.39 = 154,956.44/x
  3. Step 3: Cross multiply
    275,805.81x = 380,650.39 × 154,956.44
  4. Step 4: Simplify right side
    275,805.81x = 58,984,229,883.25
  5. Step 5: Solve for x
    x = 58,984,229,883.25/275,805.81
  6. Step 6: Final answer
    x = 213,861.45

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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.