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Finding the Fourth Proportional to 535.40, 738.68 and 349.15

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Solution

The fourth proportional to 535.40, 738.68 and 349.15 is: 481.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.40 : 738.68 = 349.15 : x
  2. Step 2: Convert to fraction form
    535.40/738.68 = 349.15/x
  3. Step 3: Cross multiply
    535.40x = 738.68 × 349.15
  4. Step 4: Simplify right side
    535.40x = 257,910.12
  5. Step 5: Solve for x
    x = 257,910.12/535.40
  6. Step 6: Final answer
    x = 481.71

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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.