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Finding the Fourth Proportional to 351.81, 527.77 and 108.31

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Solution

The fourth proportional to 351.81, 527.77 and 108.31 is: 162.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.81 : 527.77 = 108.31 : x
  2. Step 2: Convert to fraction form
    351.81/527.77 = 108.31/x
  3. Step 3: Cross multiply
    351.81x = 527.77 × 108.31
  4. Step 4: Simplify right side
    351.81x = 57,162.77
  5. Step 5: Solve for x
    x = 57,162.77/351.81
  6. Step 6: Final answer
    x = 162.48

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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.