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Finding the Fourth Proportional to 422.08, 633.36 and 239.68

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Solution

The fourth proportional to 422.08, 633.36 and 239.68 is: 359.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.08 : 633.36 = 239.68 : x
  2. Step 2: Convert to fraction form
    422.08/633.36 = 239.68/x
  3. Step 3: Cross multiply
    422.08x = 633.36 × 239.68
  4. Step 4: Simplify right side
    422.08x = 151,803.72
  5. Step 5: Solve for x
    x = 151,803.72/422.08
  6. Step 6: Final answer
    x = 359.66

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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.