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Finding the Fourth Proportional to 348.21, 480.49 and 208.31

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Solution

The fourth proportional to 348.21, 480.49 and 208.31 is: 287.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.21 : 480.49 = 208.31 : x
  2. Step 2: Convert to fraction form
    348.21/480.49 = 208.31/x
  3. Step 3: Cross multiply
    348.21x = 480.49 × 208.31
  4. Step 4: Simplify right side
    348.21x = 100,088.47
  5. Step 5: Solve for x
    x = 100,088.47/348.21
  6. Step 6: Final answer
    x = 287.44

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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.