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Finding the Fourth Proportional to 422.82, 634.32 and 302.16

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Solution

The fourth proportional to 422.82, 634.32 and 302.16 is: 453.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.82 : 634.32 = 302.16 : x
  2. Step 2: Convert to fraction form
    422.82/634.32 = 302.16/x
  3. Step 3: Cross multiply
    422.82x = 634.32 × 302.16
  4. Step 4: Simplify right side
    422.82x = 191,666.13
  5. Step 5: Solve for x
    x = 191,666.13/422.82
  6. Step 6: Final answer
    x = 453.30

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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.