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Finding the Fourth Proportional to 422.86, 633.68 and 188.31

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Solution

The fourth proportional to 422.86, 633.68 and 188.31 is: 282.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.86 : 633.68 = 188.31 : x
  2. Step 2: Convert to fraction form
    422.86/633.68 = 188.31/x
  3. Step 3: Cross multiply
    422.86x = 633.68 × 188.31
  4. Step 4: Simplify right side
    422.86x = 119,327.34
  5. Step 5: Solve for x
    x = 119,327.34/422.86
  6. Step 6: Final answer
    x = 282.19

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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.