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Finding the Fourth Proportional to 279.56, 385.95 and 248.80

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Solution

The fourth proportional to 279.56, 385.95 and 248.80 is: 343.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.56 : 385.95 = 248.80 : x
  2. Step 2: Convert to fraction form
    279.56/385.95 = 248.80/x
  3. Step 3: Cross multiply
    279.56x = 385.95 × 248.80
  4. Step 4: Simplify right side
    279.56x = 96,024.36
  5. Step 5: Solve for x
    x = 96,024.36/279.56
  6. Step 6: Final answer
    x = 343.48

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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.