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Finding the Fourth Proportional to 638.58, 958.33 and 346.68

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Solution

The fourth proportional to 638.58, 958.33 and 346.68 is: 520.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.58 : 958.33 = 346.68 : x
  2. Step 2: Convert to fraction form
    638.58/958.33 = 346.68/x
  3. Step 3: Cross multiply
    638.58x = 958.33 × 346.68
  4. Step 4: Simplify right side
    638.58x = 332,234.28
  5. Step 5: Solve for x
    x = 332,234.28/638.58
  6. Step 6: Final answer
    x = 520.27

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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.