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Finding the Fourth Proportional to 348.21, 480.56 and 217.17

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Solution

The fourth proportional to 348.21, 480.56 and 217.17 is: 299.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.21 : 480.56 = 217.17 : x
  2. Step 2: Convert to fraction form
    348.21/480.56 = 217.17/x
  3. Step 3: Cross multiply
    348.21x = 480.56 × 217.17
  4. Step 4: Simplify right side
    348.21x = 104,362.13
  5. Step 5: Solve for x
    x = 104,362.13/348.21
  6. Step 6: Final answer
    x = 299.71

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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.