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Finding the Fourth Proportional to 481.43, 721.68 and 357.71

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Solution

The fourth proportional to 481.43, 721.68 and 357.71 is: 536.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.43 : 721.68 = 357.71 : x
  2. Step 2: Convert to fraction form
    481.43/721.68 = 357.71/x
  3. Step 3: Cross multiply
    481.43x = 721.68 × 357.71
  4. Step 4: Simplify right side
    481.43x = 258,148.54
  5. Step 5: Solve for x
    x = 258,148.54/481.43
  6. Step 6: Final answer
    x = 536.22

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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.