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Finding the Fourth Proportional to 421.97, 633.14 and 162.09

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Solution

The fourth proportional to 421.97, 633.14 and 162.09 is: 243.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.97 : 633.14 = 162.09 : x
  2. Step 2: Convert to fraction form
    421.97/633.14 = 162.09/x
  3. Step 3: Cross multiply
    421.97x = 633.14 × 162.09
  4. Step 4: Simplify right side
    421.97x = 102,625.66
  5. Step 5: Solve for x
    x = 102,625.66/421.97
  6. Step 6: Final answer
    x = 243.21

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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.