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Finding the Fourth Proportional to 322.72, 485.03 and 300.85

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Solution

The fourth proportional to 322.72, 485.03 and 300.85 is: 452.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.72 : 485.03 = 300.85 : x
  2. Step 2: Convert to fraction form
    322.72/485.03 = 300.85/x
  3. Step 3: Cross multiply
    322.72x = 485.03 × 300.85
  4. Step 4: Simplify right side
    322.72x = 145,921.28
  5. Step 5: Solve for x
    x = 145,921.28/322.72
  6. Step 6: Final answer
    x = 452.16

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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.