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Finding the Fourth Proportional to 451.20, 621.99 and 327.12

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Solution

The fourth proportional to 451.20, 621.99 and 327.12 is: 450.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.20 : 621.99 = 327.12 : x
  2. Step 2: Convert to fraction form
    451.20/621.99 = 327.12/x
  3. Step 3: Cross multiply
    451.20x = 621.99 × 327.12
  4. Step 4: Simplify right side
    451.20x = 203,465.37
  5. Step 5: Solve for x
    x = 203,465.37/451.20
  6. Step 6: Final answer
    x = 450.94

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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.