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Finding the Fourth Proportional to 349.38, 520.56 and 330.75

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Solution

The fourth proportional to 349.38, 520.56 and 330.75 is: 492.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.38 : 520.56 = 330.75 : x
  2. Step 2: Convert to fraction form
    349.38/520.56 = 330.75/x
  3. Step 3: Cross multiply
    349.38x = 520.56 × 330.75
  4. Step 4: Simplify right side
    349.38x = 172,175.22
  5. Step 5: Solve for x
    x = 172,175.22/349.38
  6. Step 6: Final answer
    x = 492.80

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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.