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Finding the Fourth Proportional to 517.23, 775.97 and 170.81

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Solution

The fourth proportional to 517.23, 775.97 and 170.81 is: 256.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.23 : 775.97 = 170.81 : x
  2. Step 2: Convert to fraction form
    517.23/775.97 = 170.81/x
  3. Step 3: Cross multiply
    517.23x = 775.97 × 170.81
  4. Step 4: Simplify right side
    517.23x = 132,538.70
  5. Step 5: Solve for x
    x = 132,538.70/517.23
  6. Step 6: Final answer
    x = 256.25

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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.