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Finding the Fourth Proportional to 352.72, 529.20 and 345.44

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Solution

The fourth proportional to 352.72, 529.20 and 345.44 is: 518.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.72 : 529.20 = 345.44 : x
  2. Step 2: Convert to fraction form
    352.72/529.20 = 345.44/x
  3. Step 3: Cross multiply
    352.72x = 529.20 × 345.44
  4. Step 4: Simplify right side
    352.72x = 182,806.85
  5. Step 5: Solve for x
    x = 182,806.85/352.72
  6. Step 6: Final answer
    x = 518.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.