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Finding the Fourth Proportional to 352.56, 528.96 and 215.70

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Solution

The fourth proportional to 352.56, 528.96 and 215.70 is: 323.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.56 : 528.96 = 215.70 : x
  2. Step 2: Convert to fraction form
    352.56/528.96 = 215.70/x
  3. Step 3: Cross multiply
    352.56x = 528.96 × 215.70
  4. Step 4: Simplify right side
    352.56x = 114,096.67
  5. Step 5: Solve for x
    x = 114,096.67/352.56
  6. Step 6: Final answer
    x = 323.62

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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.