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Finding the Fourth Proportional to 279.24, 385.21 and 181.02

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Solution

The fourth proportional to 279.24, 385.21 and 181.02 is: 249.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.24 : 385.21 = 181.02 : x
  2. Step 2: Convert to fraction form
    279.24/385.21 = 181.02/x
  3. Step 3: Cross multiply
    279.24x = 385.21 × 181.02
  4. Step 4: Simplify right side
    279.24x = 69,730.71
  5. Step 5: Solve for x
    x = 69,730.71/279.24
  6. Step 6: Final answer
    x = 249.72

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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.