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Finding the Fourth Proportional to 443.57, 611.96 and 257.03

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Solution

The fourth proportional to 443.57, 611.96 and 257.03 is: 354.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.57 : 611.96 = 257.03 : x
  2. Step 2: Convert to fraction form
    443.57/611.96 = 257.03/x
  3. Step 3: Cross multiply
    443.57x = 611.96 × 257.03
  4. Step 4: Simplify right side
    443.57x = 157,287.73
  5. Step 5: Solve for x
    x = 157,287.73/443.57
  6. Step 6: Final answer
    x = 354.59

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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.