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Finding the Fourth Proportional to 443.41, 611.97 and 319.48

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Solution

The fourth proportional to 443.41, 611.97 and 319.48 is: 440.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.41 : 611.97 = 319.48 : x
  2. Step 2: Convert to fraction form
    443.41/611.97 = 319.48/x
  3. Step 3: Cross multiply
    443.41x = 611.97 × 319.48
  4. Step 4: Simplify right side
    443.41x = 195,511.74
  5. Step 5: Solve for x
    x = 195,511.74/443.41
  6. Step 6: Final answer
    x = 440.93

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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.