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Finding the Fourth Proportional to 493.08, 680.22 and 306.60

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Solution

The fourth proportional to 493.08, 680.22 and 306.60 is: 422.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.08 : 680.22 = 306.60 : x
  2. Step 2: Convert to fraction form
    493.08/680.22 = 306.60/x
  3. Step 3: Cross multiply
    493.08x = 680.22 × 306.60
  4. Step 4: Simplify right side
    493.08x = 208,555.45
  5. Step 5: Solve for x
    x = 208,555.45/493.08
  6. Step 6: Final answer
    x = 422.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.