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Finding the Fourth Proportional to 352.79, 529.18 and 121.69

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Solution

The fourth proportional to 352.79, 529.18 and 121.69 is: 182.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.79 : 529.18 = 121.69 : x
  2. Step 2: Convert to fraction form
    352.79/529.18 = 121.69/x
  3. Step 3: Cross multiply
    352.79x = 529.18 × 121.69
  4. Step 4: Simplify right side
    352.79x = 64,393.98
  5. Step 5: Solve for x
    x = 64,393.98/352.79
  6. Step 6: Final answer
    x = 182.53

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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.