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Finding the Fourth Proportional to 352.66, 528.90 and 121.56

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Solution

The fourth proportional to 352.66, 528.90 and 121.56 is: 182.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.66 : 528.90 = 121.56 : x
  2. Step 2: Convert to fraction form
    352.66/528.90 = 121.56/x
  3. Step 3: Cross multiply
    352.66x = 528.90 × 121.56
  4. Step 4: Simplify right side
    352.66x = 64,293.08
  5. Step 5: Solve for x
    x = 64,293.08/352.66
  6. Step 6: Final answer
    x = 182.31

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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.