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Finding the Fourth Proportional to 335.61, 499.90 and 331.41

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Solution

The fourth proportional to 335.61, 499.90 and 331.41 is: 493.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.61 : 499.90 = 331.41 : x
  2. Step 2: Convert to fraction form
    335.61/499.90 = 331.41/x
  3. Step 3: Cross multiply
    335.61x = 499.90 × 331.41
  4. Step 4: Simplify right side
    335.61x = 165,671.03
  5. Step 5: Solve for x
    x = 165,671.03/335.61
  6. Step 6: Final answer
    x = 493.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.