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Finding the Fourth Proportional to 348.05, 480.60 and 331.65

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Solution

The fourth proportional to 348.05, 480.60 and 331.65 is: 457.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.05 : 480.60 = 331.65 : x
  2. Step 2: Convert to fraction form
    348.05/480.60 = 331.65/x
  3. Step 3: Cross multiply
    348.05x = 480.60 × 331.65
  4. Step 4: Simplify right side
    348.05x = 159,390.99
  5. Step 5: Solve for x
    x = 159,390.99/348.05
  6. Step 6: Final answer
    x = 457.95

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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.