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Finding the Fourth Proportional to 519.28, 716.46 and 361.72

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Solution

The fourth proportional to 519.28, 716.46 and 361.72 is: 499.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.28 : 716.46 = 361.72 : x
  2. Step 2: Convert to fraction form
    519.28/716.46 = 361.72/x
  3. Step 3: Cross multiply
    519.28x = 716.46 × 361.72
  4. Step 4: Simplify right side
    519.28x = 259,157.91
  5. Step 5: Solve for x
    x = 259,157.91/519.28
  6. Step 6: Final answer
    x = 499.07

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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.