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Finding the Fourth Proportional to 422.99, 634.51 and 130.51

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Solution

The fourth proportional to 422.99, 634.51 and 130.51 is: 195.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.99 : 634.51 = 130.51 : x
  2. Step 2: Convert to fraction form
    422.99/634.51 = 130.51/x
  3. Step 3: Cross multiply
    422.99x = 634.51 × 130.51
  4. Step 4: Simplify right side
    422.99x = 82,806.73
  5. Step 5: Solve for x
    x = 82,806.73/422.99
  6. Step 6: Final answer
    x = 195.77

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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.