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Finding the Fourth Proportional to 353.15, 529.77 and 109.61

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Solution

The fourth proportional to 353.15, 529.77 and 109.61 is: 164.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.15 : 529.77 = 109.61 : x
  2. Step 2: Convert to fraction form
    353.15/529.77 = 109.61/x
  3. Step 3: Cross multiply
    353.15x = 529.77 × 109.61
  4. Step 4: Simplify right side
    353.15x = 58,068.09
  5. Step 5: Solve for x
    x = 58,068.09/353.15
  6. Step 6: Final answer
    x = 164.43

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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.