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Finding the Fourth Proportional to 279.23, 385.20 and 180.95

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Solution

The fourth proportional to 279.23, 385.20 and 180.95 is: 249.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.23 : 385.20 = 180.95 : x
  2. Step 2: Convert to fraction form
    279.23/385.20 = 180.95/x
  3. Step 3: Cross multiply
    279.23x = 385.20 × 180.95
  4. Step 4: Simplify right side
    279.23x = 69,701.94
  5. Step 5: Solve for x
    x = 69,701.94/279.23
  6. Step 6: Final answer
    x = 249.62

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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.