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Finding the Fourth Proportional to 339.62, 504.78 and 330.54

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Solution

The fourth proportional to 339.62, 504.78 and 330.54 is: 491.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.62 : 504.78 = 330.54 : x
  2. Step 2: Convert to fraction form
    339.62/504.78 = 330.54/x
  3. Step 3: Cross multiply
    339.62x = 504.78 × 330.54
  4. Step 4: Simplify right side
    339.62x = 166,849.98
  5. Step 5: Solve for x
    x = 166,849.98/339.62
  6. Step 6: Final answer
    x = 491.28

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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.