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Finding the Fourth Proportional to 331.02, 453.60 and 328.86

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Solution

The fourth proportional to 331.02, 453.60 and 328.86 is: 450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.02 : 453.60 = 328.86 : x
  2. Step 2: Convert to fraction form
    331.02/453.60 = 328.86/x
  3. Step 3: Cross multiply
    331.02x = 453.60 × 328.86
  4. Step 4: Simplify right side
    331.02x = 149,170.90
  5. Step 5: Solve for x
    x = 149,170.90/331.02
  6. Step 6: Final answer
    x = 450.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.