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Finding the Fourth Proportional to 351.36, 529.57 and 331.51

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Solution

The fourth proportional to 351.36, 529.57 and 331.51 is: 499.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.36 : 529.57 = 331.51 : x
  2. Step 2: Convert to fraction form
    351.36/529.57 = 331.51/x
  3. Step 3: Cross multiply
    351.36x = 529.57 × 331.51
  4. Step 4: Simplify right side
    351.36x = 175,557.75
  5. Step 5: Solve for x
    x = 175,557.75/351.36
  6. Step 6: Final answer
    x = 499.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.