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Finding the Fourth Proportional to 352.97, 531.30 and 319.43

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Solution

The fourth proportional to 352.97, 531.30 and 319.43 is: 480.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.97 : 531.30 = 319.43 : x
  2. Step 2: Convert to fraction form
    352.97/531.30 = 319.43/x
  3. Step 3: Cross multiply
    352.97x = 531.30 × 319.43
  4. Step 4: Simplify right side
    352.97x = 169,711.56
  5. Step 5: Solve for x
    x = 169,711.56/352.97
  6. Step 6: Final answer
    x = 480.81

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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.