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Finding the Fourth Proportional to 203.16, 279.99 and 168.20

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Solution

The fourth proportional to 203.16, 279.99 and 168.20 is: 231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.16 : 279.99 = 168.20 : x
  2. Step 2: Convert to fraction form
    203.16/279.99 = 168.20/x
  3. Step 3: Cross multiply
    203.16x = 279.99 × 168.20
  4. Step 4: Simplify right side
    203.16x = 47,092.92
  5. Step 5: Solve for x
    x = 47,092.92/203.16
  6. Step 6: Final answer
    x = 231.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.