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Finding the Fourth Proportional to 279.44, 385.35 and 252.09

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Solution

The fourth proportional to 279.44, 385.35 and 252.09 is: 347.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.44 : 385.35 = 252.09 : x
  2. Step 2: Convert to fraction form
    279.44/385.35 = 252.09/x
  3. Step 3: Cross multiply
    279.44x = 385.35 × 252.09
  4. Step 4: Simplify right side
    279.44x = 97,142.88
  5. Step 5: Solve for x
    x = 97,142.88/279.44
  6. Step 6: Final answer
    x = 347.64

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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.