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Finding the Fourth Proportional to 638.69, 956.96 and 484.43

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Solution

The fourth proportional to 638.69, 956.96 and 484.43 is: 725.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.69 : 956.96 = 484.43 : x
  2. Step 2: Convert to fraction form
    638.69/956.96 = 484.43/x
  3. Step 3: Cross multiply
    638.69x = 956.96 × 484.43
  4. Step 4: Simplify right side
    638.69x = 463,582.85
  5. Step 5: Solve for x
    x = 463,582.85/638.69
  6. Step 6: Final answer
    x = 725.84

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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.