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Finding the Fourth Proportional to 279.71, 386.30 and 249.17

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Solution

The fourth proportional to 279.71, 386.30 and 249.17 is: 344.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.71 : 386.30 = 249.17 : x
  2. Step 2: Convert to fraction form
    279.71/386.30 = 249.17/x
  3. Step 3: Cross multiply
    279.71x = 386.30 × 249.17
  4. Step 4: Simplify right side
    279.71x = 96,253.13
  5. Step 5: Solve for x
    x = 96,253.13/279.71
  6. Step 6: Final answer
    x = 344.12

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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.