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Finding the Fourth Proportional to 352.72, 531.31 and 325.99

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Solution

The fourth proportional to 352.72, 531.31 and 325.99 is: 491.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.72 : 531.31 = 325.99 : x
  2. Step 2: Convert to fraction form
    352.72/531.31 = 325.99/x
  3. Step 3: Cross multiply
    352.72x = 531.31 × 325.99
  4. Step 4: Simplify right side
    352.72x = 173,201.75
  5. Step 5: Solve for x
    x = 173,201.75/352.72
  6. Step 6: Final answer
    x = 491.05

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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.