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Finding the Fourth Proportional to 518.96, 716.11 and 319.73

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Solution

The fourth proportional to 518.96, 716.11 and 319.73 is: 441.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.96 : 716.11 = 319.73 : x
  2. Step 2: Convert to fraction form
    518.96/716.11 = 319.73/x
  3. Step 3: Cross multiply
    518.96x = 716.11 × 319.73
  4. Step 4: Simplify right side
    518.96x = 228,963.30
  5. Step 5: Solve for x
    x = 228,963.30/518.96
  6. Step 6: Final answer
    x = 441.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.