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Finding the Fourth Proportional to 348.07, 518.90 and 331.66

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Solution

The fourth proportional to 348.07, 518.90 and 331.66 is: 494.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.07 : 518.90 = 331.66 : x
  2. Step 2: Convert to fraction form
    348.07/518.90 = 331.66/x
  3. Step 3: Cross multiply
    348.07x = 518.90 × 331.66
  4. Step 4: Simplify right side
    348.07x = 172,100.09
  5. Step 5: Solve for x
    x = 172,100.09/348.07
  6. Step 6: Final answer
    x = 494.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.