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Finding the Fourth Proportional to 443.05, 611.04 and 276.96

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Solution

The fourth proportional to 443.05, 611.04 and 276.96 is: 381.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.05 : 611.04 = 276.96 : x
  2. Step 2: Convert to fraction form
    443.05/611.04 = 276.96/x
  3. Step 3: Cross multiply
    443.05x = 611.04 × 276.96
  4. Step 4: Simplify right side
    443.05x = 169,233.64
  5. Step 5: Solve for x
    x = 169,233.64/443.05
  6. Step 6: Final answer
    x = 381.97

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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.