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Finding the Fourth Proportional to 316.39, 436.28 and 249.89

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Solution

The fourth proportional to 316.39, 436.28 and 249.89 is: 344.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.39 : 436.28 = 249.89 : x
  2. Step 2: Convert to fraction form
    316.39/436.28 = 249.89/x
  3. Step 3: Cross multiply
    316.39x = 436.28 × 249.89
  4. Step 4: Simplify right side
    316.39x = 109,022.01
  5. Step 5: Solve for x
    x = 109,022.01/316.39
  6. Step 6: Final answer
    x = 344.58

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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.