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Finding the Fourth Proportional to 493.38, 681 and 306.76

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Solution

The fourth proportional to 493.38, 681 and 306.76 is: 423.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.38 : 681 = 306.76 : x
  2. Step 2: Convert to fraction form
    493.38/681 = 306.76/x
  3. Step 3: Cross multiply
    493.38x = 681 × 306.76
  4. Step 4: Simplify right side
    493.38x = 208,903.56
  5. Step 5: Solve for x
    x = 208,903.56/493.38
  6. Step 6: Final answer
    x = 423.41

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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.