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Finding the Fourth Proportional to 279.55, 385.72 and 163.05

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Solution

The fourth proportional to 279.55, 385.72 and 163.05 is: 224.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.55 : 385.72 = 163.05 : x
  2. Step 2: Convert to fraction form
    279.55/385.72 = 163.05/x
  3. Step 3: Cross multiply
    279.55x = 385.72 × 163.05
  4. Step 4: Simplify right side
    279.55x = 62,891.65
  5. Step 5: Solve for x
    x = 62,891.65/279.55
  6. Step 6: Final answer
    x = 224.97

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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.