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Finding the Fourth Proportional to 352.30, 531.06 and 321.55

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Solution

The fourth proportional to 352.30, 531.06 and 321.55 is: 484.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.30 : 531.06 = 321.55 : x
  2. Step 2: Convert to fraction form
    352.30/531.06 = 321.55/x
  3. Step 3: Cross multiply
    352.30x = 531.06 × 321.55
  4. Step 4: Simplify right side
    352.30x = 170,759.69
  5. Step 5: Solve for x
    x = 170,759.69/352.30
  6. Step 6: Final answer
    x = 484.70

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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.