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Finding the Fourth Proportional to 279.65, 385.76 and 169.09

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Solution

The fourth proportional to 279.65, 385.76 and 169.09 is: 233.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.65 : 385.76 = 169.09 : x
  2. Step 2: Convert to fraction form
    279.65/385.76 = 169.09/x
  3. Step 3: Cross multiply
    279.65x = 385.76 × 169.09
  4. Step 4: Simplify right side
    279.65x = 65,227.62
  5. Step 5: Solve for x
    x = 65,227.62/279.65
  6. Step 6: Final answer
    x = 233.25

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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.