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Finding the Fourth Proportional to 353.12, 529.79 and 109.68

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Solution

The fourth proportional to 353.12, 529.79 and 109.68 is: 164.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.12 : 529.79 = 109.68 : x
  2. Step 2: Convert to fraction form
    353.12/529.79 = 109.68/x
  3. Step 3: Cross multiply
    353.12x = 529.79 × 109.68
  4. Step 4: Simplify right side
    353.12x = 58,107.37
  5. Step 5: Solve for x
    x = 58,107.37/353.12
  6. Step 6: Final answer
    x = 164.55

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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.