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Finding the Fourth Proportional to 443.12, 611.16 and 331.94

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Solution

The fourth proportional to 443.12, 611.16 and 331.94 is: 457.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.12 : 611.16 = 331.94 : x
  2. Step 2: Convert to fraction form
    443.12/611.16 = 331.94/x
  3. Step 3: Cross multiply
    443.12x = 611.16 × 331.94
  4. Step 4: Simplify right side
    443.12x = 202,868.45
  5. Step 5: Solve for x
    x = 202,868.45/443.12
  6. Step 6: Final answer
    x = 457.82

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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.