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Finding the Fourth Proportional to 351.18, 523.34 and 339.57

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Solution

The fourth proportional to 351.18, 523.34 and 339.57 is: 506.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.18 : 523.34 = 339.57 : x
  2. Step 2: Convert to fraction form
    351.18/523.34 = 339.57/x
  3. Step 3: Cross multiply
    351.18x = 523.34 × 339.57
  4. Step 4: Simplify right side
    351.18x = 177,708.87
  5. Step 5: Solve for x
    x = 177,708.87/351.18
  6. Step 6: Final answer
    x = 506.03

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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.