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Finding the Fourth Proportional to 481.27, 718.43 and 422.89

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Solution

The fourth proportional to 481.27, 718.43 and 422.89 is: 631.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.27 : 718.43 = 422.89 : x
  2. Step 2: Convert to fraction form
    481.27/718.43 = 422.89/x
  3. Step 3: Cross multiply
    481.27x = 718.43 × 422.89
  4. Step 4: Simplify right side
    481.27x = 303,815.25
  5. Step 5: Solve for x
    x = 303,815.25/481.27
  6. Step 6: Final answer
    x = 631.27

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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.