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Finding the Fourth Proportional to 443.34, 611.68 and 310.41

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Solution

The fourth proportional to 443.34, 611.68 and 310.41 is: 428.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.34 : 611.68 = 310.41 : x
  2. Step 2: Convert to fraction form
    443.34/611.68 = 310.41/x
  3. Step 3: Cross multiply
    443.34x = 611.68 × 310.41
  4. Step 4: Simplify right side
    443.34x = 189,871.59
  5. Step 5: Solve for x
    x = 189,871.59/443.34
  6. Step 6: Final answer
    x = 428.28

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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.