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Finding the Fourth Proportional to 443.54, 611.24 and 318.98

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Solution

The fourth proportional to 443.54, 611.24 and 318.98 is: 439.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.54 : 611.24 = 318.98 : x
  2. Step 2: Convert to fraction form
    443.54/611.24 = 318.98/x
  3. Step 3: Cross multiply
    443.54x = 611.24 × 318.98
  4. Step 4: Simplify right side
    443.54x = 194,968.68
  5. Step 5: Solve for x
    x = 194,968.68/443.54
  6. Step 6: Final answer
    x = 439.58

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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.