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Finding the Fourth Proportional to 279.30, 385.56 and 168.96

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Solution

The fourth proportional to 279.30, 385.56 and 168.96 is: 233.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.30 : 385.56 = 168.96 : x
  2. Step 2: Convert to fraction form
    279.30/385.56 = 168.96/x
  3. Step 3: Cross multiply
    279.30x = 385.56 × 168.96
  4. Step 4: Simplify right side
    279.30x = 65,144.22
  5. Step 5: Solve for x
    x = 65,144.22/279.30
  6. Step 6: Final answer
    x = 233.24

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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.