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Finding the Fourth Proportional to 433.52, 648.88 and 331.20

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Solution

The fourth proportional to 433.52, 648.88 and 331.20 is: 495.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.52 : 648.88 = 331.20 : x
  2. Step 2: Convert to fraction form
    433.52/648.88 = 331.20/x
  3. Step 3: Cross multiply
    433.52x = 648.88 × 331.20
  4. Step 4: Simplify right side
    433.52x = 214,909.06
  5. Step 5: Solve for x
    x = 214,909.06/433.52
  6. Step 6: Final answer
    x = 495.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.