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Finding the Fourth Proportional to 517.19, 775.96 and 243.31

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Solution

The fourth proportional to 517.19, 775.96 and 243.31 is: 365.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.19 : 775.96 = 243.31 : x
  2. Step 2: Convert to fraction form
    517.19/775.96 = 243.31/x
  3. Step 3: Cross multiply
    517.19x = 775.96 × 243.31
  4. Step 4: Simplify right side
    517.19x = 188,799.19
  5. Step 5: Solve for x
    x = 188,799.19/517.19
  6. Step 6: Final answer
    x = 365.05

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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.